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

Question 1

Which of the following best describes the structure of DNA as determined by Watson and Crick?

Accepted Answer

A double helix with two strands held together by hydrogen bonds between complementary nitrogenous bases.

Question 2

Which of the following is NOT a component of a DNA nucleotide?

Accepted Answer

A ribose sugar

Question 3

During DNA replication, which enzyme is primarily responsible for adding new nucleotides to the growing DNA strand?

Accepted Answer

DNA polymerase

Question 4

Which of the following statements about mutations is TRUE?

Accepted Answer

Mutations can be beneficial, harmful, or have no effect depending on their context.

Question 5

If a DNA strand has the sequence 5'-ATCGGTA-3', what is the complementary DNA strand sequence?

Accepted Answer

3'-TAGCCAT-5'

Question 6

Which of the following best explains why DNA replication is described as 'semi-conservative'?

Accepted Answer

Each new DNA molecule consists of one parental strand and one newly synthesized strand.

Question 7

Which nitrogenous base is found in RNA but not in DNA?

Accepted Answer

Uracil

Question 8

A mutation occurs in a gene that codes for a DNA repair enzyme. Which of the following is a likely consequence?

Accepted Answer

The cell will accumulate more mutations over time.

Question 9

Which process describes the synthesis of RNA from a DNA template?

Accepted Answer

Transcription

Question 10

In eukaryotic cells, where does translation occur?

Accepted Answer

Cytoplasm

Question 11

Which of the following best describes the flow of genetic information in a cell?

Accepted Answer

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

Question 12

Which of the following is a real-world example of a mutagen?

Accepted Answer

Ultraviolet light from the sun causing skin damage

Question 13

Which of the following best explains why the Human Genome Project was significant?

Accepted Answer

It sequenced the entire human genome, providing a reference for genetic research.

Question 14

Which of the following is a difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

Question 15

A scientist exposes bacterial cells to a chemical that causes errors during DNA replication. What is the most likely outcome?

Accepted Answer

The bacteria will accumulate mutations, some of which may be beneficial, harmful, or neutral.

Question 16

Which of the following best describes the role of the sugar-phosphate backbone in DNA?

Accepted Answer

It provides structural support for the molecule.

Question 17

If a mutation changes a DNA base from adenine (A) to cytosine (C), what type of mutation has occurred?

Accepted Answer

Substitution

Question 18

Which of the following is a direct result of errors in DNA replication that are not repaired?

Accepted Answer

A mutation will be passed to daughter cells.

Question 19

Which of the following best explains why collaboration is important in scientific discoveries, as seen in the history of DNA research?

Accepted Answer

Collaboration brings together different expertise and perspectives, leading to breakthroughs.

Question 20

Which of the following is the correct complementary base pairing in DNA?

Accepted Answer

Adenine pairs with thymine, guanine pairs with cytosine

Chapter 10: The Structure and Function of DNA – Study Notes

Study Guide - Practice Questions