Question 1

Which of the following best describes the role of SPINK6 in the influenza virus life cycle, as shown in the diagram?

Accepted Answer

SPINK6 inhibits host serine proteases, preventing the cleavage of viral hemagglutinin and reducing viral infectivity.

Question 2

During coronavirus entry into a host cell, which step is directly facilitated by the ACE2 receptor?

Accepted Answer

Binding of the viral spike protein to the host cell surface

Question 3

Which phase of mitosis is characterized by the alignment of chromosomes at the cell's equatorial plate, and approximately how long does this phase last in a typical animal cell?

Accepted Answer

Metaphase; ~20 minutes

Question 4

Which of the following statements about meiosis is correct?

Accepted Answer

Meiosis allows for genetic diversity through crossing over during Prophase I.

Question 5

A researcher is designing a clinical trial and must decide on participant compensation. Which of the following is a potential ethical issue with paying more than a local day’s wage?

Accepted Answer

It may induce people to participate against their own best interests, compromising voluntary informed consent.

Question 6

Which of the following best explains why mass extinctions are significant in the history of life on Earth?

Accepted Answer

They result in the loss of a large proportion of species, opening ecological niches for new evolutionary lineages.

Question 7

Which equation best represents the relationship between the cost of drug development ($$C$$), the number of failures ($$F$$), and the total R&D spending ($$R) as $$described in the study materials?

Accepted Answer

$$C = \frac{R}{F+1}$$

Question 8

Which of the following is a direct result of errors during meiosis?

Accepted Answer

Aneuploidy, such as Down syndrome

Question 9

In the context of viral infection, what is the primary function of proteolytic cleavage within endosomes?

Accepted Answer

To activate viral proteins necessary for membrane fusion and entry

Question 10

Which of the following is a plausible consequence of paying less than a day’s wage to clinical trial participants?

Accepted Answer

Decreased diversity of the study group due to low compensation

Question 11

Which of the following best describes the ethical concern of 'undue influence' in clinical research compensation?

Accepted Answer

Offering compensation that may compromise voluntary informed consent

Question 12

Which Nobel Prize-winning biotechnology technique, discussed in the study materials, allows for precise genome editing?

Accepted Answer

CRISPR-Cas9

Question 13

Which of the following is a key difference between mitosis and meiosis?

Accepted Answer

Mitosis produces genetically identical cells, while meiosis increases genetic diversity.

Question 14

A patient with a deficiency in carbamoyl phosphate synthetase I (CPS1) would most likely experience which of the following symptoms?

Accepted Answer

Excessive accumulation of ammonia in the blood (hyperammonemia)

Question 15

Which of the following best explains why the same individuals repeatedly participating in clinical trials can be problematic?

Accepted Answer

It reduces the representativeness of the study population.

Question 16

Which of the following is a direct application of the CRISPR-Cas9 technique?

Accepted Answer

Editing genes to correct mutations in living organisms

Question 17

Which of the following best describes the relationship between mass extinctions and climate change, as shown in the provided climate data?

Accepted Answer

Mass extinctions often coincide with significant changes in global temperature.

Question 18

Which of the following is a likely outcome if a clinical trial pays participants a bonus that is too large for completion?

Accepted Answer

Participants may feel unduly induced to stay in the study, even if they wish to withdraw.

Question 19

Which of the following best describes the process of viral fusion and uncoating in the context of influenza or coronavirus infection?

Accepted Answer

Fusion allows the viral genome to enter the host cytoplasm after proteolytic cleavage of viral proteins.

Viruses, Cell Division, Mass Extinctions, and Bioethics

Study Guide - Practice Questions

Study Guide - Flashcards