FREE AND STUDY GAMES ABOUT BIOCHEMISTRY 2 EXAM

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FREE AND STUDY GAMES ABOUT BIOCHEMISTRY 2 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -135 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: What is the function of Carbonic Anhydrase?

Answer:

hydration of CO2.

Question 2: Which property has not been observed for membrane proteins?

Answer:

energy storage

Question 3: What are the two different types of fatty acids?

Answer:

can be saturated (all C-C single bonds) or unsaturated (some C=C double bonds) Question 4: Which of the following best describes the process of DNA replication in a prokaryote?

Answer:

Replication begins at a unique site and proceeds in two directions, meeting about halfway around a typically circular chromosome

Question 5: What is the Y-intercept of a lineweaver-burk plot?

Answer:

1/Vmax

Question 6: What is catalytic perfection?

Answer:

the diffusion-controlled limit is 108 to 109 M-1s-1, and many enzymes have a kcat/KM near this range Question 7: In the operation of the sodium-potassium pump a membrane protein is...

Answer:

phosphorylated with ATP as the source of the phosphate group Question 8: Which of following best describes the two-step process for adding amino acids to tRNAs?

Answer:

AA + ATP -> AA-AMP + PPi; AA-AMP + tRNA -> AA-tRNA + AMP

Question 9: what Sphingomyelin is composed of

Answer:

Sphingosine, Fatty acid, Phosphate

Question 10: What is a Lipid?

Answer:

a heterogeneous class of naturally occurring organic compounds classified together on the basis of common solubility properties

Question 11: What are Open Chain form lipids?

Answer:

compounds with polar head groups and long non-polar hydrocarbon tails

Question 12: why are Sugars on the surface of cells important?

Answer:

especially important in identifying the cell.

Question 13: what is zero-order kinetics?

Answer:

rate does NOT depend on concentration of substrate.

Question 14: What is the difference between a cis and trans fatty acid?

Answer:

A cis C=C bond puts a kink in the long-chain hydrocarbon tail, while that of a trans C=C bond is like that of a saturated fatty acid in its fully extended conformation Question 15: what enzyme is responsible for the bulk of DNA synthesis during replication?

Answer:

DNA Polymerase III

Question 16: What is a Irreversible inhibitor

Answer:

a substance that causes inhibition that cannot be reversed

Question 17: What is Arguably, the most important steroid?

Answer:

cholesterol: contains only

one hydrophilic -OH group, so overall is extremely hydrophobic

Question 18: What is the function of chymotrypsin?

Answer:

proteolytic enzyme

Question 19: The genetic code is said to be degenerate. This means that

Answer:

many of the amino acids are coded by different codons

Question 20: How is The lipid bilayer arrangement held together

Answer:

noncovalent interactions such as van der waals and hydrophobic interactions

Question 21: What are Gangliosides an examples of?

Answer:

glycosphingolipids with a complex carbohydrate moiety that contains more than three sugars

Question 22: what greatly influences the

membrane fluidity, properties and function

Answer:

the degree of fatty acid unsaturation.

Question 23: What is the slope of a Lineweaver-burk plot?

Answer:

KM/Vmax Question 24: major difficulty in extracting receptor proteins from membranes is that

Answer:

it is difficult to remove the proteins from the membrane without denaturation, there may be very few molecules of the protein in a cell,receptor proteins tend to have high molecular weights.

Question 25: what is Multiple sclerosis is characterized by?

Answer:

destruction of the myelin sheath

Question 26: The products of saponification of a triglyceride include

Answer:

The salt of the fatty acids, soaps, glycerol.

Question 27: What % of total weight are proteins?

Answer:

account for 20-80% of total membrane weight