Bch 361 Exam 2 Review (Chen) Updated Actual Questions And Correct Answers

BCH 361 EXAM 2 REVIEW (CHEN) UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. What percent of the body is composed of DNA?

Answer:
1%

Question:
2. What percent of the body is made of RNA?

Answer:
6%

Question:
3. Three components of a nucleotide

Answer:
A phosphate group, a five-carbon sugar, and a nitrogenous base

Question:
4. Difference between nucleotide and nucleoside?

Answer:
Nucleoside does not have a phosphate group

Question:
5. RNA Bases

Answer:
Adenine, Uracil, Cytosine, Guanine

Question:
6. DNA bases

Answer:
Adenine, Thymine, Guanine, Cytosine

Question:
7. Difference between purine and pyrimidine?

Answer:
purine: 2 rings
pyrimidine: 1 ring

, Question:
8. Which type of bonds link nitrogenous bases and sugars
to form nucleosides?

Answer:
Beta-Glycosidic bonds

Question:
9. Which base spontaneously deaminates to form uracil?

Answer:
cytosine

Question:
10. DNA repair system prevents which type of mutations?

Answer:
C to U mutations

Question:
11. DNA and RNA are what type of polymers?

Answer:
linear polymers

Question:
12. DNA and RNA are made of how many nucleotides?

Answer:
4

Question:
13. DNA backbone had a negative charge causing what type
of force?

Answer:
repulsive force

Question:
14. Catalytic mechanism of Alkaline Hydrolysis

Answer:
2'-OH attacks 3'-phosphate

Question:
15. A high pH solution does what to RNA?

Answer:
hydrolyzes RNA and denatures it