Biochemistry - Statistics

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This quiz has been taken 60 times
The average score is 18 of 51

Answer Stats

Question	Answer	% Correct
Which of the following is not an organelle?	Plasma membrane	76%
Which of the following is not one of the 6 most common elements found in life?	All of the above are basic elements of life	67%
Metabolism is best defined as the ___________.	Reactions that synthesize and degrade molecules in living cells	62%
Which of the following is not true of life?	All living things produce energy using mitochondria	57%
Which of the following amino acids contain a hydrophobic side chain?	Leucine	57%
B-pleated sheets are associated with what level of protein structure?	Secondary	57%
The overall three-dimensional structure of a polypeptide is referred to as _________ structure.	Tertiary	57%
Which of the following is not a class of amino acid?	Asymmetric	52%
Which of the following classes of enzymes catalyze reactions involving the cleavage of bonds by the addition of water?	Hydrolase	52%
The amino acid sequence of a polypeptide is referred to as _________ structure.	Primary	52%
Lactose intolerance arises from ____________.	the inability of intestinal enzymes to cleave the lactose	52%
The most important buffer in blood?	Carbonate/bicarbonate buffer	48%
Energy requiring transport mechanisms include	C. Primary active transport	48%
Which of the following describes the low of genetic information as stated in the central dogma of molecular biology?	DNA --> RNA --> Protein	48%
Which of the following reacts with Acetyl-CoA to form citrate?	Oxaloacetate	48%
Which of the following is not an example of a macromolecule?	Amino Acid	43%
The DNA "backbone" is composed of	A phosphodiester bond between 3' and 5' hydroxyl groups of adjacent deoxyribose residues	43%
Which of the following is not a class of amino acid?	Asymmetric	43%
Glucose-6-phosphate is a substrate in which of the following processes?	Both A and B are correct	43%
The principal structural carbohydrate of plants is ______________.	Cellulose	43%
Which of the following is present only in prokaryotic cells?	None of the above is correct	38%
Redox potential is best defined as	The tendency of a species to gain or lose electrons	38%
In glycolysis __________ net moles of ATP are produce per mole of glucose consumed.	two	38%
In glycolysis _________ moles of NADH are produced per mole of glucose consumed.	two	38%
Double headed curved arrows show the movement of what?	Two e-'s	38%
Which of the following amino acids is not one of the twenty standard amino acids?	Cystine	33%
Catalysts are effective because they ___________.	E. both B and C are correct	33%
Which of the following is a hydronium ion?	H3O+	33%
In glycoproteins carbohydrate is most often linked to threonine, asparagine or ___________.	serine	33%
Fatty acids are referred to as __________ groups.	Acyl	29%
Which of the following molecules is not a lipid?	All of the above are lipids	29%
Which of the following sugars contains a B-1,4-linkage?	Cellulose	29%
The double bonds in naturally occurring fatty acids are usually ____________ isomers.	Cis	29%
Which of the following amino acids would be classified as a nonstandard amino acid?	Cystine	29%
Phospholipids are	E. Both A and B are correct	29%
Which of the following is required for the conversion of UDP-glucose to glycogen?	E. Both A and B are correct	29%
In the Lineweaver-Burk double reciprocal plot the slope is equal to ____________.	Km/Vmax	29%
Why is the peptide bond stronger than the ester bond?	Resonance stabilization of the amide bond	29%
In addition to serine and aspartate which of the following amino acids is a member of the serine triad?	Histidine	24%
In anaerobic organisms pyruvate is used to regenerate cellular __________.	NAD+	24%
Which of the following interactions does not stabilize tertiary structure?	None of the above	24%
FADH2 is a product of which of the following reactions?	Succinate --> Fumarate	24%
The excluded volume of a cell varies between _______ and ________%.	20-40	19%
The presence of which of the following molecules indicates that the cell has sufficient energy reserves?	A. ATP	19%
The regulated enzymes of the citric acid cycle include _____________.	a-Ketoglutarate dehydrogenase	19%
Which of the following enzymes catalyzes an irreversible process?	Pyruvate kinase	19%
Which of the following reactions requires GDP?	Succinyl-CoA --> Succinate	19%
The following is an example of which reaction class? CH3Br + HSCH2CH(NH2)COOH ---> CH3SCH2CH(NH2)COOH + Br- + H+	Substitution	14%
Which is more stable and why? i. anti-parallel B-sheets ii. parallel B-sheets iii. there is no stability difference iv. the H-bond donors and acceptors line up straight across from each other v. the H-bond donors and acceptors are slightly offset from each other	ii, iv	5%
Which of the following is a hydrophobic amino acid?	Phenylalanine	5%
Which of the following does not contribute to the noncovalent interactions that stabilize the helical strands of DNA?	Phosphodiester bonds	0%

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