$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following is NOT a required characteristic for a molecule to serve as genetic material?

Accepted Answer

The ability to directly influence the development of traits

Question 2

In the central dogma of molecular genetics, which sequence correctly represents the flow of genetic information?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 3

Why were proteins initially favored over DNA as the genetic material before 1944?

Accepted Answer

Proteins were thought to have greater chemical diversity

Question 4

Which experiment provided the first direct experimental proof that DNA is the biomolecule responsible for heredity?

Accepted Answer

Avery, MacLeod, and McCarty’s experiment

Question 5

In the Hershey-Chase experiment, which radioactive isotope was used to label DNA?

Accepted Answer

$$^{32}	ext{P}$$

Question 6

If 15% of the nitrogenous bases in a sample of DNA are thymine, what percentage should be cytosine?

Accepted Answer

35%

Question 7

Which of the following statements about the structure of DNA is CORRECT according to the Watson and Crick model?

Accepted Answer

The two strands are antiparallel and held together by complementary base pairing

Question 8

Which chemical group is found at the 3' end of a DNA strand?

Accepted Answer

Hydroxyl group ($$-OH)$$

Question 9

Which of the following is a purine base found in nucleic acids?

Accepted Answer

Adenine

Question 10

What is the main difference between the sugars found in DNA and RNA?

Accepted Answer

DNA contains deoxyribose, RNA contains ribose

Question 11

Which of the following best describes the role of tRNA during translation?

Accepted Answer

It carries amino acids to the ribosome for protein synthesis

Question 12

Which of the following is TRUE regarding the denaturation of DNA?

Accepted Answer

Denaturation can be monitored by a hyperchromic shift in UV absorption

Question 13

Which technique uses fluorescent probes to detect specific DNA sequences on chromosomes?

Accepted Answer

Fluorescent in situ hybridization (FISH)

Question 14

Which of the following is a key feature of RNA that distinguishes it from DNA?

Accepted Answer

RNA contains ribose as its sugar

Question 15

Which of the following bonds link nucleotides together in a single strand of DNA?

Accepted Answer

Phosphodiester bonds

Question 16

A retrovirus such as HIV replicates its genome by which process?

Accepted Answer

Using RNA as a template to synthesize DNA

Question 17

Which of the following best explains why the percentage of guanine does not always equal the percentage of adenine in double-stranded DNA?

Accepted Answer

Guanine pairs with cytosine, while adenine pairs with thymine

Question 18

Which of the following is a real-world application of DNA denaturation and renaturation?

Accepted Answer

Molecular hybridization for detecting specific DNA sequences

Question 19

Which of the following statements about Chargaff’s rules is correct?

Accepted Answer

The amount of A equals the amount of T, and the amount of G equals the amount of C

Question 20

Which of the following best describes the outcome of Griffith’s transformation experiment?

Accepted Answer

A chemical component of one cell could transform another

Chapter 10: DNA Structure and Analysis – Study Notes

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