Biology 130 | Biology homework help


Question 1 of 48

3.75 Points

Decondensed chromatin is located amid the

A.nucleolus during deeptenance              

B.life during cell deeptenance          

C.life during cell division     

D.nucleolus during cell division  Reset Selection

 

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Question 2 of 48

3.75 Points

The misfortune arch-villain Dr. Bfailure Thumb has generated a new settle pathogen. The microbe has an enzyme confessing it to at-once mismiswithhold β 1-4 glycosidic linkages to α 1-4 glycosidic linkages in a healthy arena of settles. If Dr. Bfailure Thumb’s contemplation is not thwarted, outenlargement harvests could be penniless due to

A.amyrisk and amylopectin comely rigorous and inedible.            

B.settle starches comely undeviating and popping cell membranes.   

 C.

plants flopping aggravate.

D.polysaccharides misappropriateing into monosaccharides.      Reset Selection

 

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Question 3 of 48

3.75 Points

An monad delay an monadic heap of 89 and an monadic calculate of 39 has how many

neutrons?

 A.128   

 B.2        

 C.50     

 D.59      Reset Selection

 

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Question 4 of 48

3.75 Points

What factors confess a pool of 20 amino shrewds to effect thousands of choice proteins? (Select all that use.)

 A. abnormity in elongation of amino shrewd backbone   

 B. each protein is encoded by a definite gene    

 C. abnormity in tertiary composition               

 D. abnormitys in which amino shrewds are used        

 E. abnormitys in glycosidic linkage              

 F. abnormitys in the sign of peptide bond             

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Question 5 of 48

3.75 Points

_________________ frustblame embodied from runing in or out of the brain’s capillaries

A.Desmosomes               

B.Plasmodesmatas         

C.Gap attachments               

D.Tight attachments              Reset Selection

 

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Question 6 of 48

3.75 Points

Cardiac muscle exacts attachments that confess electrical importants through. Cardiac muscle to-boot relies on calcium to abbreviate. What attachment is confused and what organelle stores calcium?

A.desmosomes, mitigate ER       

B.plasmodesmata, blunt ER      

C.gap, mitigate ER            

D.tight, blunt ER              Reset Selection

 

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Question 7 of 48

3.75 Points

The edifice blocks of nucleic shrewds are

A.sugars.            

B.nucleotides.  

C.peptides.        

D.nitrogenous means.     Reset Selection

 

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Question 8 of 48

3.75 Points

Which propoundments recount sodium monads? Select all that use.

 A. constitutes cations             

 B. closest to the left bordain of the intermittent table  

 C. catholicly constitutes covalent bonds 

 D. comprises 1 valence electron  

 E. has 2 electrons in the primary distillation mitigate           

 F. can risk one electron catholicly  

 G. exterior distillation mitigate is stable  

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Question 9 of 48

3.75 Points

If an integrin protein is mutated what cell duty force be artful?

A.despatch betwixt cytoskeleton and proteglycan           

B.fluidity of phospholipids          

C.cellular motility            

D.cytoplasmic despatch    Reset Selection

 

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Question 10 of 48

3.75 Points

Buffers are expressive for doing experiments in labs, but they are not mismiswithhold to influence classifications.

 True

 False

Reset Selection

 

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Question 11 of 48

3.75 Points

The cell supposition propounds

A.all cells conciliate comprise DNA, all cells are the last influence things that can deal-out and all organisms are secure of cells 

B.all organisms are secure of multiple cells, all cells originate gratuitously and all cells exact nutrients             

C.all cells are the last influence things, all organisms are secure of one or past cells and all cells originate gratuitously               

D.all organisms are secure of one or past cells, all cells are the last influence things and all cells originate from other cells                Reset Selection

 

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Question 12 of 48

3.75 Points

Hiking in the unspotted woods, you peek inbordain a cave and engagement a senseless grizzly permit! Its metabolic blame seems to be very low. What do you forecast is the prevailing sign of reaction occurring in this permit?

A.fatty shrewd anabolism  

B.carbohydblame catabolism         

C.carbohydblame anabolism          

D.fatty shrewd catabolism  Reset Selection

 

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Question 13 of 48

3.75 Points

Rosenberg, a chemist, was observing the proceeds of an electric arena on bacterial enlargement. He observed that bacteria stopped dividing when in an electric arena. This elaboration led to the anti-cancer garbage cisplatin, a platinum compriseing amalgamation. Rosenberg’s indication was an copy of 

science.

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Question 14 of 48

3.75 Points

Enzymes are catalysts in reactions. What propoundments recount dutys of enzymes? Select all that use.

 A. Enzymes are inequitefficient in their actions.               

 B. Once an enzyme obliges to a substrate, it cannot be used frequently.            

 C. Enzymes inferior the distillation of activation needed for a reaction            

 D. Enzymes exexvary the quantity of unobstructed distillation effectd           

 E. Enzyme distillation can be artful by sphere.       

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Question 15 of 48

3.75 Points

In biological macromolecules like proteins, the hydrophobic residues incline to disconcert concertedly in the delayin of the closed composition. What is the best expoundation for why this occurs?

A.Polar residues incline to oblige to infiltrate in the cytoplasm as courteous as to each other. The infiltrate and polar residues cannot oblige to the hydrophobic ones, so in the lowest distillation propound the hydrophobic residues are pushed concertedly in the intermediate.   

B.Protein folding machinery expounds the amino shrewd statute to mob hydrophobic residues into the life of proteins. This classification must be expressive, consequently the cell expends catholic quantitys of ATP to indisputably coordinate protein folding.

C.Hydrophobic residues oblige to each other in inequitefficient ways. For persuasion, Ala constitutes di-methyl bonds, and phenylalanine obliges isoleucine. This generates a tensely frisk hydrophobic cwaste nucleus.   

D.Hydrophobic residues oblige each other, timeliness polar residues cannot oblige each other. Therefore the hydrophobic ones end up collect to each other in the nucleus of the protein.    Reset Selection

 

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Question 16 of 48

3.75 Points

If two disconnections are unanalogous, the one conciliate the upper breath of solutes is

A.isotonic           

B.hypertonic     

C.hypotonic        Reset Selection

 

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Question 17 of 48

3.75 Points

You are cunning a museum prove to indoctrinate persons encircling cells. In the inlet to the prove, visitors riding a runing walkway lower lum-nous lights conciliate gradually “shrink” down in magnitude. To generate this dream, visitors conciliate ignoring monster moulds of different biological compatability, accompanied by layer bars.

Match each mould to the mismiswithhold layer bar to go delay it.

A. 1 μm

B. 1nm

C. 10μm

D. 1cm

E. 1m

F. 0.1 nm

                1. Carbon monad

                2. cell life

                3. DNA monad (10bp)

                4. civilized being

                5. civilized eyeball

                6. bark cell

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Question 18 of 48

3.75 Points

The steepy mosaic mould recounts membranes as steepy due to

A.phospholipids sporadically placed throughout the membrane               

B.the membrane is chiefly secure of infiltrate 

C.the proteins and the phospholipids can instigate laterally throughout the membrane      

D.upper quantitys of cholesterol              

E.upper quantitys of cholesterol               Reset Selection

 

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Question 19 of 48

3.75 Points

Cholera destroys aggravate 100,000 persons each year worldwide due to diarrhea. The cholera toxin opens the CFTR chloride document in the viscera, so that sufferers risk chloride, sodium and heapive quantitys of infiltrate.

On the other exertionman, the identical CFTR document is mutated in cystic fibrosis patients. Delay distillation too LOW, they failure chloride run and mucus builds up in the lungs.

This illustrates the consequence of pointed curb of document hole, notorious as

____________regulation.

A.gated               

B.ungated          

C.passive             Reset Selection

 

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Question 20 of 48

3.75 Points

When viewing the mould of a civilized cheek cell, what microscope would most likely be used?

A.light  

B.dissecting       

C.transmission electron               

D.scanning electron        Reset Selection

 

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Question 21 of 48

3.75 Points

At a fast, you are served a hamburger delay cheese, onions, and beef on a bun. What ingredients resemble the most carbohydrates? Select all that use.

 A. beef               

 B. bun 

 C. onion             

 D. cheese          

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Question 22 of 48

3.75 Points

Estrogen and testosterone are structurally connected to cholesterol. Based on what you enjoy read encircling cholesterol, forecast how these steroid hormones important to the cell.

A.They are phagocytosed, lowly, and then released into the cell.    

B.They fashion the membrane so steepy that mean pores show, confessing them to ignoring through.    

C.They discursive undeviatingly thblunt the plasma membrane and into the cell.               

D.They oblige to receptors on the outbordain of the membrane, which then activate an intracellular importanting cascade.                Reset Selection

 

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Question 23 of 48

3.75 Points

Noncompetitive discommend occurs when

A.a be obliges at the distillation birth  

B.a be obliges on a birth loose from the detached birth 

C.denaturing an enzyme             

D.increasing the distillation of an enzyme   Reset Selection

 

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Question 24 of 48

3.75 Points

Organisms must use macromolecules that enjoy properties to competition their dutyal exactments. In the roll beneath, prefer the mismiswithhold macromonad whose properties engage the exactment.

A. glycogen

B. RNA

C. DNA

D. cellulose

E. starch

                1. Requirement:

Strong cell walls

 

Properties:

Linear polymer undeviating and strong

                2. Requirement

Stefficient storage of information

 

Properties:

4 mean pairs, not catholicly hydrolyzed

                3. Requirement:

Energy storage for seeds

Properties:

Energy-rich polysaccharides

                4. Requirement:

Short-term distillation storage (animals)

Properties:

Energy-rich polysaccharide

                5. Requirement:

Transient transmission of information

Properties:

4 mean pairs, catholicly hydrolyzed

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Question 25 of 48

3.75 Points

Membrane proteins are efficient to perverse consequently sections are secure of

A.nonpolar phosphate regions 

B.hydrophilic amino shrewds.           

C.hydrophobic amino shrewds         

D.polar amino shrewds        

E.hydrophilic phosphate regions               Reset Selection

 

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Question 26 of 48

3.75 Points

The mould of the cell is prevailingly deeptained by the

A.plasma membrane     

B.cytoskeleton 

C.cytoplasm      

D.endomembrane classification           Reset Selection

 

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Question 27 of 48

3.75 Points

What is the duty of cholesterol in plasma membranes?

A.allows ions to ignoring     

B.regulates pH 

C.promotesartherosclerosis       

D.regulates steepyity          Reset Selection

 

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Question 28 of 48

3.75 Points

When donating respect, hemoglobin mitigates are measured by using a thin glass tube to conciliate respect from a finger prick. The respect is pulled up the tube by _____________________.

A.cohesiveness               

B.covalent bonds            

C.hydrophobic interactions        

D.hydrogen bonds         

E.ionic bonds     Reset Selection

 

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Question 29 of 48

3.75 Points

What protein is competitioned delay its duty?

A.aquaporins – instigate infiltrate thblunt the membrane by detached rapture               

B.consigner protein – noninequitefficient and conciliate confess embodied to ignoring undeviatingly through    

C.document protein – confess ignoringage of embodied thblunt the hydrophilic pore        

D.rapture proteins – confess ignoringage of embodied delay the aid of ATP

 

Reset Selection

 

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Question 30 of 48

3.75 Points

C6H12O6 + 6O2 à 6H2O + 6CO2 is an copy of ________________.

 

A.catabolism     

B.anabolism      

C.synthesis         Reset Selection

 

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Question 31 of 48

3.75 Points

Carbon-12, Carbon-13, and Carbon-14 are copys of

 

A.isomers           

B.molecules      

C.ions   

D.isotopes         

E.enantiomers  Reset Selection

 

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Question 32 of 48

3.75 Points

What propoundment(s) recounts a breath gradient?

 A. Oxygen in respect plasma is .31 per 100 ml. Oxygen carried delay hemoglobin is .69 per 100 ml. 

 B. Extracellular steepy comprises 13.5 mmol of calcium, and 9 mmol of calcium is in the plasma.        

 C. The sphere inbordain the car is 39 marks Celsius and the sphere outbordain the heed is 39 mark Celsius.        

 D. Red respect cells cytoplasm comprises a 0.9% salt disconnection. The extracellular steepy is 1.0%.             

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Question 33 of 48

3.75 Points

How can ice rapture?

A.the covalent bonds enlarge, decreasing density           

B.the hydrogen bonds enlarge, decreasing density         

C.the covalent bonds obsoleteness, increasing density            

D.the hydrogen bonds obsoleteness, increasing density          Reset Selection

 

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Question 34 of 48

3.75 Points

Which of the aftercited constitute the basis of plasma membranes?

A.Glycoproteins              

B.Fatty shrewds      

C.Glycolipids     

D.Phospholipids              

E.Proteins           Reset Selection

 

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Question 35 of 48

3.75 Points

You and your localitymate are grocery shopping. “I don’t get it,” she says. “My savant said I should buy this eespecial droop consequently I don’t incorporate it courteous. But this disgrace says ‘lactose-free’ and this disgrace says ‘lactase added’ – which do I deficiency?”

You reply: “The

_______________ is a sugar in droop that you enjoy disaster incorporateing, and

_________________ is an enzyme that conciliate incorporate it for you.

A.lactase, lactose            

B.lactose,lactase              Reset Selection

 

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Question 36 of 48

3.75 Points

If sodium does not instigate down its gradient in the co-rapture interrogate, what would be the outcome?

A.Sugar would not be artful 

B.Sugar would not be efficient to instigate down the gradient 

C.Sugar would not be efficient to instigate up the gradient         Reset Selection

 

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Question 37 of 48

3.75 Points

When phospholipids are placed in infiltrate, why does a bilayer constitute?

A.Phospholipids are naturally attracted to each other, forcing phosphate heads to visage the aqueous areas.        

B.The fatty shrewd tails are solid concertedly loose from the infiltrate, and infiltrate can generate hydrogen bonds delay the phosphate heads. 

C.Lipids are hydrophilic and conciliate from hydrogen bonds delay the infiltrate, forcing the hydrophobic heads towards the intermediate of the bilayer.        

D.The polar tails conciliate be attracted to the infiltrate and the nonpolar heads conciliate be attracted to each other.   Reset Selection

 

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Question 38 of 48

3.75 Points

To infringe chemical bonds to set-on-foot a chemical reaction, ___________ distillation is needed.

A.kinetic             

B.potential         

C.activation       

D.free   Reset Selection

 

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Question 39 of 48

3.75 Points

The microbiologist Louis Pasteur constrained pasteurization, generated vaccines for anthrax and rabies, and aided expound the nucleus supposition of distemper. He is repeatedly quoted as byword, “Chance favors the quick memory.” A past accublame translation from the French, incidentually, is “Where study is uneasy, hazard favors merely the quick memory.” What can you finish encircling Pasteur’s situation encircling the role of hazard in philosophical indication?

A.He deliberation that hazard incidents are merely utilityous if someone is intelligent ample to lowerstand what happened.          

B.He deliberation that study of star choice doesn’t do any good-natured-natured if the linguist is not quick to expound and prosper up on the hazard indication, due to a inurement of conceptionful exertion.       

C.He deliberation you would enjoy to be prosperous to heed a hazard incident.        

D.He deliberation that hazard is the deep determinant of who is auspicious in comprehension, so all you can do is expectation you get prosperous.                Reset Selection

 

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Question 40 of 48

3.75 Points

A tarantula has view legs, an arachnid in the ordain Araneae. A grass spider has view legs, an arachnid in the ordain Araneaa. A mouse spider has view legs, an arachnid in the ordain Araneae. There is a mould. All organisms in this ordain enjoy view legs. This is 

 

reasoning

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Question 41 of 48

3.75 Points

In a chocolate bar delay nuts and caramel, there are 12 grams of fat, 33 grams of carbohydrates and 4 grams of protein. What percentage of calories comes from fat?

 A.6.5%

 B.19%  

 C.53%  

 D.41      Reset Selection

 

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Question 42 of 48

3.75 Points

Normal (homeostatic) pH mitigate of respect serum’s pH is environing 7.4. Carbonic shrewd is released in the respect to aid deeptain a pH that has violent hydroxyl mitigates. This would action pH to exexvary from

A.basic to shrewdic               

B.basic to impartial            

C.impartial to basic            

D.acidic to 7.4   

E.basic to 7.4      Reset Selection

 

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Question 43 of 48

3.75 Points

What is the pathway in which a protein instigates thblunt the endomembrane classification?

A.blunt ER, Golgi habiliments, mitigate ER, rapture vesicle, plasma membrane  

B.plasma membrane, rapture vesicle, Golgi habiliments, blunt ER           

C.blunt ER, Golgi habiliments, rapture vesicle, plasma membrane           

D.mitigate ER, Golgi habiliments, rapture vesicle, plasma membrane        Reset Selection

 

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Question 44 of 48

3.75 Points

Molecules instigate from a violent to low breath in

A.isotonic disconnections        

B.hypotonic disconnections   

C.hypertonic disconnections  

D.diffusion         

E.osmosis            Reset Selection

 

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Question 45 of 48

3.75 Points

What copys recount the second law of thermodynamics? Select all that use.

 A. A gentleman conciliate droop when you cull it up and let it droop.  

 B. A frying pan is on a hot stove. When removed it conciliate promising.      

 C. Ice cubes conciliate run in a zealous locality.  

 D. Donuts nutrients are used to aid you application.        

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Question 46 of 48

3.75 Points

 

Researchers are exertioning to clear biofuels to unobstructed us from trust on fossil fuels. Based on what you comprehend encircling cellulose, what do you forecast are the main utility and disutility of using cellulose-rich settle embodied as biofuel?

A.There is not abundant distillation in the glycosidic bonds of cellulose, but at lowest there is a lot of it.   

B.There is not abundant distillation in the peptide bonds of cellulose, but at lowest it is very not-troublesome to infringe down

C.The infringedown of cellurisk into fructose is an endergonic reaction, but an enzyme can counterexhibition the equilibrium.          

D.Cellurisk is very troublesome to infringe down into glucose, but it comprises a lot of distillation.    Reset Selection

 

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Question 47 of 48

3.75 Points

The impermepower of cell plasma membranes is a main interspace to using garbages to destroy tooth cells or like cells transgenically. CPPs are peptides that were discovered to enjoy the power to rapture themselves (and smooth decided consignment) into cells. How they get into cells is stationary a puzzle, but CPPs all enjoy multiple categorically charged groups. Which of the aftercited membrane components are they most likely to be interacting delay?

A.cholesterol    

B.inward membrane proteins  

C.phospholipid heads   

D.phospholipid tails        Reset Selection

 

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Question 48 of 48

3.75 Points

Which of the aftercited is an copy of an aliphatic hydrocarbon?

A.Benzene         

B.Estrogen         

C.Cholesterol    

 

D.Methane