Question 1

Which of the following best explains how a DNA sequence influences an organism's phenotype?

Accepted Answer

DNA sequences are transcribed into RNA, which is then translated into proteins that perform cellular functions and determine traits.

Question 2

A scientist wants to create a genetically modified organism (GMO) that glows under UV light. Which method would most likely be used?

Accepted Answer

Introducing a gene from a fluorescent jellyfish into the organism's DNA using transgenic technology.

Question 3

Which of the following is a potential benefit of genetically modified crops such as Bt corn?

Accepted Answer

Increased resistance to insect pests, reducing the need for chemical pesticides.

Question 4

Which statement best distinguishes modern GMO creation from selective breeding?

Accepted Answer

GMO creation allows for the introduction of genes from unrelated species, while selective breeding relies on natural variation within a species.

Question 5

Which of the following is NOT a type of pathogen?

Accepted Answer

Antibody

Question 6

A virus consists of which basic structural components?

Accepted Answer

Capsid, nucleic acid, and recognition spike

Question 7

Which scenario best describes an epidemic?

Accepted Answer

A disease outbreak that spreads rapidly within a specific region or population.

Question 8

How can mutations in viral genes affect the spread of a virus?

Accepted Answer

Mutations can create new strains or variants that may be more transmissible or evade immune responses.

Question 9

Which human activity is most likely to contribute to the emergence of new infectious diseases?

Accepted Answer

Deforestation and increased contact with wildlife

Question 10

Which immune system response is characterized by redness, swelling, and pain at the site of infection?

Accepted Answer

Inflammatory response

Question 11

What is the primary function of antibodies produced by B cells?

Accepted Answer

To recognize and bind to specific pathogens, marking them for elimination.

Question 12

Which type of vaccine uses a weakened form of the virus to stimulate an immune response?

Accepted Answer

Live-attenuated vaccine

Question 13

Why is it important that a vaccine resembles the target virus?

Accepted Answer

So the immune system can recognize and mount a defense against the actual virus if encountered.

Question 14

Which equation best represents the flow of genetic information in a cell?

Accepted Answer

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

Question 15

A population achieves herd immunity when:

Accepted Answer

A sufficient proportion of individuals are immune, reducing the spread of disease even to those who are not immune.

Question 16

Which of the following best describes a zoonotic disease?

Accepted Answer

A disease that is transmitted from animals to humans.

Question 17

If a virus mutates rapidly, what is a likely consequence for vaccine development?

Accepted Answer

Vaccines may need to be updated frequently to match new viral strains.

Question 18

Which of the following is a real-world example of a genetically modified organism used for human benefit?

Accepted Answer

AquAdvantage salmon, which grows faster due to an introduced growth hormone gene.

Question 19

Which process is most likely to result in a new viral variant?

Accepted Answer

A mutation in the viral genome during replication.

Question 20

Which of the following best describes the goal of vaccination at the population level?

Accepted Answer

To reduce the spread of infectious diseases and protect individuals who cannot be vaccinated.

Genetics, Pathogens, and Immunity: Key Concepts in Modern Biology

Study Guide - Practice Questions