Biology 130 | Biology homework help


Question 1 of 48

3.75 Points

Decondensed chromatin is located among the

A.nucleolus during oceantenance              

B.kernel during cell oceantenance          

C.kernel 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. Bnoncommunication Thumb has bring-aboutd a new place pathogen. The microbe has an enzyme assigning it to at-once turn β 1-4 glycosidic linkages to α 1-4 glycosidic linkages in a perfect province of places. If Dr. Bnoncommunication Thumb’s artfulness is not thwarted, fruit harvests could be penniless due to

A.amyimperil and amylopectin suitoperative impenetroperative and inedible.            

B.place starches suitoperative stubborn and popping cell membranes.   

 C.

plants flopping balance.

D.polysaccharides turning into monosaccharides.      Reset Selection

 

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Question 3 of 48

3.75 Points

An bit delay an bitic greaterity of 89 and an bitic reckon 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 assign a pool of 20 amino acutes to consequence thousands of uncommon proteins? (Select all that dedicate.)

 A. alteration in extension of amino acute backbone   

 B. each protein is encoded by a separate gene    

 C. alteration in tertiary edifice               

 D. alterations in which amino acutes are used        

 E. alterations in glycosidic linkage              

 F. alterations in the sign of peptide bond             

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Question 5 of 48

3.75 Points

_________________ forefend embodied from influenceing in or out of the brain’s capillaries

A.Desmosomes               

B.Plasmodesmatas         

C.Gap fastenings               

D.Tight fastenings              Reset Selection

 

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Question 6 of 48

3.75 Points

Cardiac muscle exacts fastenings that assign electrical conspicuouss through. Cardiac muscle besides relies on calcium to curtail. What fastening is watchful and what organelle stores calcium?

A.desmosomes, ease ER       

B.plasmodesmata, churlish ER      

C.gap, ease ER            

D.tight, churlish ER              Reset Selection

 

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Question 7 of 48

3.75 Points

The erection blocks of nucleic acutes are

A.sugars.            

B.nucleotides.  

C.peptides.        

D.nitrogenous disesteemeds.     Reset Selection

 

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Question 8 of 48

3.75 Points

Which particularizements define sodium bits? Select all that dedicate.

 A. devises cations             

 B. closest to the left bdirect of the interrupted table  

 C. abundantly devises covalent bonds 

 D. incloses 1 valence electron  

 E. has 2 electrons in the principal disposition flatten           

 F. can imperil one electron abundantly  

 G. external disposition flatten is stable  

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Question 9 of 48

3.75 Points

If an integrin protein is mutated what cell duty might be abnormal?

A.message among cytoskeleton and proteglycan           

B.fluidity of phospholipids          

C.cellular motility            

D.cytoplasmic message    Reset Selection

 

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Question 10 of 48

3.75 Points

Buffers are leading for doing experiments in labs, but they are not pertinent to patronage plans.

 True

 False

Reset Selection

 

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Question 11 of 48

3.75 Points

The cell hypothesis particularizes

A.all cells succeed incoccasion DNA, all cells are the last patronage things that can bisect and all organisms are tight of cells 

B.all organisms are tight of multiple cells, all cells commence gratuitously and all cells exact nutrients             

C.all cells are the last patronage things, all organisms are tight of one or further cells and all cells commence gratuitously               

D.all organisms are tight of one or further cells, all cells are the last patronage things and all cells commence from other cells                Reset Selection

 

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Question 12 of 48

3.75 Points

Hiking in the clear woods, you peek inbdirect a cave and converge a inerratic grizzly permit! Its metabolic rate seems to be very low. What do you foreshadow is the prevalent sign of reaction occurring in this permit?

A.fatty acute anabolism  

B.carbohydrate catabolism         

C.carbohydrate anabolism          

D.fatty acute catabolism  Reset Selection

 

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Question 13 of 48

3.75 Points

Rosenberg, a chemist, was observing the effects of an electric province on bacterial enunciatement. He observed that bacteria stopped dividing when in an electric province. This elaboration led to the anti-cancer refuse cisplatin, a platinum incloseing amalgamation. Rosenberg’s disruption was an illustration of 

science.

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Question 14 of 48

3.75 Points

Enzymes are catalysts in reactions. What particularizements define dutys of enzymes? Select all that dedicate.

 A. Enzymes are inequitoperative in their actions.               

 B. Once an enzyme unites to a substrate, it cannot be used repeatedly.            

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

 D. Enzymes qualify the totality of clear disposition consequenced           

 E. Enzyme principle can be abnormal by region.       

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Question 15 of 48

3.75 Points

In biological macromolecules love proteins, the hydrophobic residues manage to spoil concurrently in the inland of the contracted edifice. What is the best description for why this occurs?

A.Polar residues manage to unite to insinuate in the cytoplasm as polite as to each other. The insinuate and polar residues cannot unite to the hydrophobic ones, so in the lowest disposition particularize the hydrophobic residues are pushed concurrently in the average.   

B.Protein folding machinery explains the amino acute enactment to pack hydrophobic residues into the courage of proteins. This way must be leading, consequently the cell expends catholic totalitys of ATP to indisputably coordinate protein folding.

C.Hydrophobic residues unite to each other in inequitoperative ways. For precedence, Ala devises di-methyl bonds, and phenylalanine unites isoleucine. This bring-abouts a compactly skip hydrophobic secret heart.   

D.Hydrophobic residues unite each other, suitableness polar residues cannot unite each other. Therefore the hydrophobic ones end up amass to each other in the heart of the protein.    Reset Selection

 

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Question 16 of 48

3.75 Points

If two disruptions are divergent, the one succeed the better force of solutes is

A.isotonic           

B.hypertonic     

C.hypotonic        Reset Selection

 

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Question 17 of 48

3.75 Points

You are crafty a museum manifest to train mass encircling cells. In the admission to the manifest, visitors riding a influenceing walkway underneathneath gleaming lights succeed gradually “shrink” down in bigness. To bring-encircling this vision, visitors succeed by monster plans of diversified biological space, accompanied by lamina bars.

Match each plan to the misdedicate lamina bar to go delay it.

A. 1 μm

B. 1nm

C. 10μm

D. 1cm

E. 1m

F. 0.1 nm

                1. Carbon bit

                2. cell kernel

                3. DNA atom (10bp)

                4. rational being

                5. rational eyeball

                6. bark cell

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Question 18 of 48

3.75 Points

The fuseing mosaic plan defines membranes as fuseing due to

A.phospholipids sporadically placed throughout the membrane               

B.the membrane is oceanly tight of insinuate 

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

D.better totalitys of cholesterol              

E.better totalitys of cholesterol               Reset Selection

 

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Question 19 of 48

3.75 Points

Cholera destroys balance 100,000 mass each year worldwide due to diarrhea. The cholera toxin opens the CFTR chloride utensil in the entrails, so that sufferers imperil chloride, sodium and greaterityive totalitys of insinuate.

On the other achievementman, the identical CFTR utensil is mutated in cystic fibrosis patients. Delay principle too LOW, they noncommunication chloride warinesser and mucus builds up in the lungs.

This illustrates the significance of correct govern of utensil space, unreserved as

____________regulation.

A.gated               

B.ungated          

C.passive             Reset Selection

 

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Question 20 of 48

3.75 Points

When viewing the devise of a rational cheek cell, what microscope would most lovely 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 asceticism, you are served a hamburger delay cheese, onions, and beef on a bun. What ingredients illustrate the most carbohydrates? Select all that dedicate.

 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 keep versed encircling cholesterol, foreshadow how these steroid hormones conspicuous to the cell.

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

B.They bring-encircling the membrane so fuseing that fine pores answer, assigning them to by through.    

C.They discursive straightly thchurlish the plasma membrane and into the cell.               

D.They unite to receptors on the outbdirect of the membrane, which then activate an intracellular conspicuousing cascade.                Reset Selection

 

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Question 23 of 48

3.75 Points

Noncompetitive discountenance occurs when

A.a essential unites at the principle residence  

B.a essential unites on a residence far from the erratic residence 

C.denaturing an enzyme             

D.increasing the principle of an enzyme   Reset Selection

 

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Question 24 of 48

3.75 Points

Organisms must use macromolecules that keep properties to mate their dutyal exactments. In the register under, choose-out the misdedicate macroatom whose properties converge the exactment.

A. glycogen

B. RNA

C. DNA

D. cellulose

E. starch

                1. Requirement:

Strong cell walls

 

Properties:

Linear polymer stubborn and strong

                2. Requirement

Stoperative storage of information

 

Properties:

4 disesteemed pairs, not abundantly hydrolyzed

                3. Requirement:

Energy storage for seeds

Properties:

Energy-rich polysaccharides

                4. Requirement:

Short-term disposition storage (animals)

Properties:

Energy-rich polysaccharide

                5. Requirement:

Transient transmission of information

Properties:

4 disesteemed pairs, abundantly hydrolyzed

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Question 25 of 48

3.75 Points

Membrane proteins are operative to wayward consequently sections are tight of

A.nonpolar phosphate regions 

B.hydrophilic amino acutes.           

C.hydrophobic amino acutes         

D.polar amino acutes        

E.hydrophilic phosphate regions               Reset Selection

 

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Question 26 of 48

3.75 Points

The devise of the cell is prevalently oceantained by the

A.plasma membrane     

B.cytoskeleton 

C.cytoplasm      

D.endomembrane plan           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 by     

B.regulates pH 

C.promotesartherosclerosis       

D.regulates fuseingity          Reset Selection

 

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Question 28 of 48

3.75 Points

When donating class, hemoglobin flattens are measured by using a straightened glass tube to earn class from a finger prick. The class 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 mateed delay its duty?

A.aquaporins – propel insinuate thchurlish the membrane by erratic rapture               

B.conveyance protein – noninequitoperative and succeed assign embodied to by straightly through    

C.utensil protein – assign byage of embodied thchurlish the hydrophilic pore        

D.rapture proteins – assign byage 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 illustration 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 illustrations 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 particularizement(s) defines a force gradient?

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

 B. Extracellular fuseing incloses 13.5 mmol of calcium, and 9 mmol of calcium is in the plasma.        

 C. The region inbdirect the car is 39 grades Celsius and the region outbdirect the wariness is 39 grade Celsius.        

 D. Red class cells cytoplasm incloses a 0.9% salt disruption. The extracellular fuseing is 1.0%.             

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Question 33 of 48

3.75 Points

How can ice bear?

A.the covalent bonds unfold, decreasing density           

B.the hydrogen bonds unfold, decreasing density         

C.the covalent bonds abandonment, increasing density            

D.the hydrogen bonds abandonment, increasing density          Reset Selection

 

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Question 34 of 48

3.75 Points

Which of the aftercited devise the institution of plasma membranes?

A.Glycoproteins              

B.Fatty acutes      

C.Glycolipids     

D.Phospholipids              

E.Proteins           Reset Selection

 

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Question 35 of 48

3.75 Points

You and your groundmate are grocery shopping. “I don’t get it,” she says. “My teacher said I should buy this eespecial subside consequently I don’t arrange it polite. But this stigma says ‘lactose-free’ and this stigma says ‘lactase added’ – which do I lack?”

You reply: “The

_______________ is a sugar in subside that you keep torment arrangeing, and

_________________ is an enzyme that succeed arrange 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 propel down its gradient in the co-rapture cross-examine, what would be the consequence?

A.Sugar would not be abnormal 

B.Sugar would not be operative to propel down the gradient 

C.Sugar would not be operative to propel up the gradient         Reset Selection

 

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Question 37 of 48

3.75 Points

When phospholipids are placed in insinuate, why does a bilayer devise?

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

B.The fatty acute tails are rigorous concurrently far from the insinuate, and insinuate can bring-encircling hydrogen bonds delay the phosphate heads. 

C.Lipids are hydrophilic and succeed from hydrogen bonds delay the insinuate, forcing the hydrophobic heads towards the average of the bilayer.        

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

 

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Question 38 of 48

3.75 Points

To shiver chemical bonds to set-on-foot a chemical reaction, ___________ disposition 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 deceptive pasteurization, bring-aboutd vaccines for anthrax and rabies, and accelerationed illustrate the embryo hypothesis of distemper. He is frequently quoted as speech, “Chance favors the apt remembrance.” A further considerate translation from the French, at-last, is “Where attention is watchful, accident favors barely the apt remembrance.” What can you argue encircling Pasteur’s lie encircling the role of accident in or-laws disruption?

A.He conceit that accident episodes are barely accelerationful if someone is quick sufficient to underneathstand what happened.          

B.He conceit that attention of celebrity uncommon doesn’t do any good-natured-natured if the student is not apt to explain and thrive up on the accident disruption, due to a habituationuation of literary achievement.       

C.He conceit you would keep to be auspicious to mark a accident episode.        

D.He conceit that accident is the ocean determinant of who is auspicious in comprehension, so all you can do is trust you get auspicious.                Reset Selection

 

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Question 40 of 48

3.75 Points

A tarantula has prospect legs, an arachnid in the direct Araneae. A grass spider has prospect legs, an arachnid in the direct Araneaa. A mouse spider has prospect legs, an arachnid in the direct Araneae. There is a plan. All organisms in this direct keep prospect 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 flatten of class serum’s pH is encircling 7.4. Carbonic acute is released in the class to acceleration oceantain a pH that has haughty hydroxyl flattens. This would suit pH to qualify from

A.basic to acuteic               

B.basic to indifferent            

C.indifferent 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 route in which a protein propels thchurlish the endomembrane plan?

A.churlish ER, Golgi habiliments, ease ER, rapture vesicle, plasma membrane  

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

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

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

 

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Question 44 of 48

3.75 Points

Molecules propel from a haughty to low force in

A.isotonic disruptions        

B.hypotonic disruptions   

C.hypertonic disruptions  

D.diffusion         

E.osmosis            Reset Selection

 

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Question 45 of 48

3.75 Points

What illustrations define the prevent law of thermodynamics? Select all that dedicate.

 A. A gentleman succeed decline when you choose it up and let it decline.  

 B. A frying pan is on a hot stove. When removed it succeed timid.      

 C. Ice cubes succeed fuse in a influenceionate ground.  

 D. Donuts nutrients are used to acceleration you drill.        

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Question 46 of 48

3.75 Points

 

Researchers are achievementing to enunciate biofuels to clear us from self-reliance on fossil fuels. Based on what you apprehend encircling cellulose, what do you foreshadow are the greater custom and discustom of using cellulose-rich place embodied as biofuel?

A.There is not fur disposition in the glycosidic bonds of cellulose, but at smallest there is a lot of it.   

B.There is not fur disposition in the peptide bonds of cellulose, but at smallest it is very manageable to shiver down

C.The shiverdown of celluimperil into fructose is an endergonic reaction, but an enzyme can counterposition the equilibrium.          

D.Celluimperil is very obscure to shiver down into glucose, but it incloses a lot of disposition.    Reset Selection

 

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Question 47 of 48

3.75 Points

The impermeability of cell plasma membranes is a greater allotment to using refuses to destroy tooth cells or influence cells transgenically. CPPs are peptides that were discovered to keep the ability to rapture themselves (and flush steadfast merchandise) into cells. How they get into cells is stationary a enigma, but CPPs all keep multiple categorically full groups. Which of the aftercited membrane components are they most lovely to be interacting delay?

A.cholesterol    

B.true 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 illustration of an aliphatic hydrocarbon?

A.Benzene         

B.Estrogen         

C.Cholesterol    

 

D.Methane