Q: Which equation correctly represents the process of cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{energy (ATP)}$$

Question 1

Which organelle is responsible for producing ATP in both plant and animal cells, and why is this process essential for cellular function?

Accepted Answer

Mitochondrion; it converts glucose and oxygen into ATP, which powers cellular activities.

Question 2

A scientist is testing a new drug to reduce the duration of COVID-19 symptoms. She divides patients into two groups: one receives the drug, the other receives a placebo. What is the primary purpose of the control group in this experiment?

Accepted Answer

To compare the effects of the drug against no treatment and rule out placebo effects.

Question 3

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

Mitosis results in two diploid cells, while meiosis results in four haploid cells.

Question 4

Which equation correctly represents the process of cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{energy (ATP)}$$

Question 5

A mutation changes a DNA codon from GAA to TAA. Using the genetic code, what is the likely effect on the resulting protein?

Accepted Answer

The mutation introduces a stop codon, likely resulting in a truncated, nonfunctional protein.

Question 6

Which of the following statements about the scientific method is correct?

Accepted Answer

A theory is a broad explanation supported by multiple lines of evidence.

Question 7

In a population where most individuals are vaccinated against a contagious disease, what is the effect on the spread of the disease?

Accepted Answer

The spread of the disease is disrupted, providing herd immunity to unvaccinated individuals.

Question 8

Which organ system is primarily responsible for gas exchange in humans?

Accepted Answer

Respiratory system

Question 9

A patient with a mutation in a tumor suppressor gene is at increased risk for which condition?

Accepted Answer

Cancer, due to loss of cell cycle regulation

Question 10

Which of the following best explains why people with COVID-19 often experience fatigue and low energy?

Accepted Answer

The virus disrupts cellular respiration, reducing ATP availability.

Question 11

Which of the following is a correct interpretation of an odds ratio (OR) of 2.32 for obesity and intubation risk in COVID-19 patients under 75 years old?

Accepted Answer

Obese patients are 2.32 times more likely to require intubation than non-obese patients.

Question 12

Which of the following best describes the role of primers in the polymerase chain reaction (PCR)?

Accepted Answer

Primers bind to specific sequences flanking the target DNA, allowing DNA polymerase to initiate replication.

Question 13

Which of the following is a multifactorial polygenic trait influenced by both genetic and environmental factors?

Accepted Answer

Obesity

Question 14

Which of the following best describes the function of the endocrine system?

Accepted Answer

It secretes hormones that regulate body activities.

Question 15

Which of the following statements about alleles is correct?

Accepted Answer

Alleles are different forms of a gene found at the same locus on homologous chromosomes.

Question 16

Which process is responsible for converting solar energy into chemical energy in plants?

Accepted Answer

Photosynthesis

Question 17

Which of the following is a correct statement about the relationship between correlation and causation in scientific studies?

Accepted Answer

Correlation does not imply causation; further testing is needed to establish causality.

Question 18

Which of the following best describes the function of the immune system?

Accepted Answer

It protects the body against infectious agents.

Question 19

Which of the following is a correct description of a dominant allele?

Accepted Answer

An allele that masks the effect of a recessive allele in a heterozygote.

General Biology: Concepts, Processes, and Case Studies

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