Question 1

Which of the following best describes the structure of a DNA nucleotide?

Accepted Answer

A phosphate group, a deoxyribose sugar, and a nitrogenous base

Question 2

Which type of bond holds together the sugar-phosphate backbone of DNA?

Accepted Answer

Phosphodiester bonds

Question 3

If a segment of DNA has the sequence 5'-ATCG-3', what is the complementary sequence?

Accepted Answer

3'-TAGC-5'

Question 4

During DNA replication, which enzyme is responsible for unwinding the double helix?

Accepted Answer

DNA helicase

Question 5

What does 'semiconservative replication' mean in the context of DNA?

Accepted Answer

Each new DNA molecule consists of one original strand and one new strand

Question 6

A point mutation in DNA is best described as:

Accepted Answer

A change in a single nucleotide base

Question 7

Which of the following environmental factors is most likely to cause mutations in DNA?

Accepted Answer

Ultraviolet (UV) radiation

Question 8

A kinesiology student is studying the myostatin gene, which affects muscle growth. How could knowledge of DNA mutations in this gene be useful for exercise science?

Accepted Answer

It can help explain why some individuals have greater muscle development due to genetic differences

Question 9

Which enzyme is responsible for adding new nucleotides and proofreading during DNA replication?

Accepted Answer

DNA polymerase

Question 10

A student gets a sunburn after a day outside. From a DNA perspective, why is sunscreen important?

Accepted Answer

It helps block UV light, which can cause mutations in DNA

Question 11

Which of the following best explains why early scientists doubted that DNA was the hereditary molecule?

Accepted Answer

DNA was thought to be too simple, with only four types of bases

Question 12

A deletion mutation in DNA results in:

Accepted Answer

The removal of one or more nucleotides from the DNA sequence

Question 13

Which of the following best describes the role of DNA ligase during DNA replication?

Accepted Answer

It joins together fragments of DNA on the lagging strand

Question 14

A translocation mutation is characterized by:

Accepted Answer

A segment of DNA being moved to a new location

Question 15

How does the sequence of bases (A, T, C, G) in DNA provide instructions to cells?

Accepted Answer

The order of bases encodes genetic information for building proteins

Question 16

Which of the following is a real-world example of how understanding DNA repair mechanisms can benefit public health?

Accepted Answer

Communities can advocate for reduced pollution to lower mutation rates and cancer risk

Question 17

Which of the following best compares DNA to a programming language or data storage system?

Accepted Answer

DNA stores information using a specific sequence of bases, similar to how code stores instructions using a sequence of symbols

Question 18

A consumer is considering purchasing a 'DNA-based fitness plan.' Which question would best help them evaluate the scientific reliability of the product?

Accepted Answer

Is there peer-reviewed scientific evidence supporting the plan's claims?

Question 19

Which of the following is a multi-step process that ensures DNA replication accuracy?

Accepted Answer

DNA polymerase adds nucleotides and proofreads for errors, while other enzymes repair mismatches

Question 20

If a DNA strand has the sequence $$5'-GATTACA-3'$$, what is the complementary strand produced during replication?

Accepted Answer

$$3'-CTAATGT-5'$$

DNA: The Molecule of Heredity – Guided Study and Practice

Guida di studio - Domande di pratica

Study guide - Flashcard