Q: Which of the following best describes the Central Dogma of molecular biology?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following best describes the scientific method as outlined by Sir Francis Bacon?

Accepted Answer

A linear sequence of steps: observation, hypothesis, prediction, experiment, and analysis.

Question 2

A hypothesis must be testable and falsifiable. Which of the following statements is an example of a scientific hypothesis?

Accepted Answer

If plants are exposed to sunlight, they will grow faster than those kept in darkness.

Question 3

Which of the following is NOT a property of life?

Accepted Answer

Randomness

Question 4

In an experiment testing the effect of pollution on fish survival, which variable is the dependent variable?

Accepted Answer

Survival rate of fish

Question 5

Which domain includes organisms that are always single-celled and lack a nucleus?

Accepted Answer

Domain Bacteria

Question 6

Which of the following best illustrates the relationship between structure and function in biology?

Accepted Answer

The shape of hemoglobin allows it to transport oxygen efficiently.

Question 7

Which of the following is an example of negative feedback in biological systems?

Accepted Answer

Sweating to reduce body temperature when overheated.

Question 8

Which of the following best describes the Central Dogma of molecular biology?

Accepted Answer

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

Question 9

Which type of graph is most appropriate for displaying the relationship between two independent variables?

Accepted Answer

Scatter graph

Question 10

A scientist wants to test whether a new fertilizer increases plant growth. She sets up two groups: one receives the fertilizer, the other does not. What type of experiment is this?

Accepted Answer

Manipulative experiment

Question 11

Which of the following is a key difference between a hypothesis and a theory?

Accepted Answer

A theory is a hypothesis that has survived repeated testing and has substantial experimental support.

Question 12

Which of the following is an example of quantitative data?

Accepted Answer

The height of a plant measured in centimeters.

Question 13

Which of the following is NOT a mechanism of evolution?

Accepted Answer

Homeostasis

Question 14

Why is the peer review process important in scientific research?

Accepted Answer

It allows scientists to critique and validate each other's work before publication.

Question 15

Which of the following best describes the hierarchical organization of life?

Accepted Answer

Atoms \rightarrow Molecules \rightarrow Organelles \rightarrow Cells \rightarrow Tissues \rightarrow Organs \rightarrow Organ Systems \rightarrow Organism \rightarrow Population \rightarrow Community \rightarrow Ecosystem \rightarrow Biosphere

Question 16

Which of the following is an example of positive feedback in biological systems?

Accepted Answer

Blood clotting after an injury.

Question 17

Which of the following statements about evolution is correct?

Accepted Answer

Populations evolve over time.

Question 18

Which of the following is a real-world example of an adaptation resulting from natural selection?

Accepted Answer

Broad, ridged teeth in grain-eating animals for grinding food.

Question 19

If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of biological organization are represented in this muscle?

Accepted Answer

Organelle, cell, and tissue

Question 20

Which of the following best describes the flow of energy through an ecosystem?

Accepted Answer

Energy flows in one direction, entering as sunlight, converted to chemical energy, passed to consumers, and exits as heat.

Chapter 1: Evolution, the Themes of Biology, and Scientific Inquiry – Study Notes

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