Question 1

Which of the following best describes the primary purpose of DNA replication in living organisms?

Accepted Answer

To transmit genetic information to the next generation

Question 2

Which statement correctly explains how DNA replication transmits genetic information to offspring?

Accepted Answer

DNA replication ensures that each daughter cell receives an identical copy of the genetic material

Question 3

What are the two main types of nucleic acids found in cells, and what is their primary function?

Accepted Answer

DNA and RNA; DNA stores genetic information, RNA helps in protein synthesis

Question 4

Using the structure of a nucleotide, which of the following correctly identifies its three main components?

Accepted Answer

Sugar, phosphate group, nitrogenous base

Question 5

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

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar

Question 6

The Hershey and Chase experiment provided evidence that DNA is the hereditary material. Which result from their experiment supported this conclusion?

Accepted Answer

Radioactive DNA was found inside the infected bacteria

Question 7

According to Chargaff's rule, which of the following equations correctly represents the relationship between the bases in double-stranded DNA?

Accepted Answer

$$A = T$$ and $$G = C$$

Question 8

Which feature allows you to distinguish DNA from RNA using Chargaff's rule?

Accepted Answer

DNA contains thymine instead of uracil

Question 9

Which bonds hold the two strands of the DNA double helix together?

Accepted Answer

Hydrogen bonds between complementary bases

Question 10

During DNA replication, which enzyme is responsible for synthesizing the new DNA strand by adding nucleotides?

Accepted Answer

DNA polymerase

Question 11

Which of the following best explains why DNA replication is considered 'semiconservative'?

Accepted Answer

Each new DNA molecule contains one original strand and one new strand

Question 12

If DNA replication enzymes are exposed to temperatures outside their optimal range, what is the most likely effect?

Accepted Answer

Replication will slow down or stop due to enzyme denaturation

Question 13

Which of the following is a common mistake that can occur during DNA replication?

Accepted Answer

Insertion of incorrect nucleotides

Question 14

UV light can damage DNA by causing which specific type of lesion?

Accepted Answer

Thymine dimers

Question 15

Which DNA repair process specifically removes and replaces damaged nucleotides, such as those caused by UV light?

Accepted Answer

Nucleotide excision repair

Question 16

What are two main reasons eukaryotic DNA replication is more complicated than prokaryotic replication?

Accepted Answer

Eukaryotes have linear chromosomes and complex chromatin structure

Question 17

What is the role of telomeres in chromosomes?

Accepted Answer

They protect chromosome ends from degradation and prevent fusion with other chromosomes

Question 18

How does telomerase contribute to aging and cancer?

Accepted Answer

Telomerase lengthens telomeres, allowing cells to divide indefinitely

Question 19

Which of the following best describes the function of restriction enzymes in genetic engineering?

Accepted Answer

They cut DNA at specific recognition sequences

Question 20

During gel electrophoresis, what property of DNA allows it to move through the gel when an electric current is applied?

Accepted Answer

DNA is negatively charged and moves toward the positive electrode

Genetic Information Flow, DNA Structure, Replication, and Genetic Engineering Study Guide

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