Question 1

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

Accepted Answer

The flow of genetic information from DNA to RNA to protein

Question 2

Pasteur’s experiment with the swan-neck flask was important because it demonstrated that:

Accepted Answer

Cells arise only from preexisting cells, not by spontaneous generation

Question 3

Which of the following is NOT a characteristic of a good experimental design?

Accepted Answer

Using a small sample size to minimize variability

Question 4

A scientist hypothesizes that a new drug increases the rate of cell division. Which of the following would be the best null hypothesis for this experiment?

Accepted Answer

The new drug has no effect on the rate of cell division

Question 5

Which of the following best explains why mutations in DNA are important for evolution?

Accepted Answer

Mutations introduce heritable variations that can be acted upon by natural selection

Question 6

In the context of the Tree of Life, which statement is correct regarding phylogenetic trees?

Accepted Answer

Branches that do not share a recent common ancestor represent distantly related species

Question 7

Which of the following is an example of evolutionary adaptation as described in the study of finches on the Galapagos Islands?

Accepted Answer

Finches with small, pointed beaks increased in population due to increased rainfall and seed abundance

Question 8

Which of the following best describes the role of RNA in the cell according to the Central Dogma?

Accepted Answer

RNA acts as a messenger carrying genetic information from DNA to be used in protein synthesis

Question 9

A population of bacteria is exposed to an antibiotic. Some bacteria survive due to a genetic mutation. Which process best explains the increase in frequency of the mutation in subsequent generations?

Accepted Answer

Natural selection

Question 10

Which of the following is a correct statement about the cell theory?

Accepted Answer

All living organisms are composed of cells, and all cells come from preexisting cells

Question 11

Which of the following best describes a hypothesis in scientific research?

Accepted Answer

A testable statement that explains a specific observation

Question 12

Which of the following is an example of a prediction derived from a hypothesis?

Accepted Answer

If fertilizer is added to plants, then their growth rate will increase

Question 13

Which of the following is a correct application of the concept of a control group in an experiment?

Accepted Answer

A group that does not receive the experimental treatment, used for comparison

Question 14

Which of the following best explains why energy processing is considered a characteristic of life?

Accepted Answer

Living organisms must acquire and use energy to maintain order and carry out life processes

Question 15

A scientist is studying a new species of microorganism. Which of the following would be the best evidence that it is alive?

Accepted Answer

It is made up of one or more cells and can reproduce

Question 16

Which of the following best describes the difference between a theory and a hypothesis?

Accepted Answer

A theory is a broad explanation supported by extensive evidence, while a hypothesis is a specific, testable statement

Question 17

Which of the following best illustrates the concept of adaptation?

Accepted Answer

A population of insects develops resistance to a pesticide over several generations

Question 18

Which of the following is a correct statement about the transmission of genetic information?

Accepted Answer

DNA is copied with high accuracy, but mutations can introduce changes that are heritable

Question 19

Which of the following best describes the process of speciation?

Accepted Answer

Populations diverge to form new species

Question 20

Which of the following is an example of a confounding variable in an experiment testing the effect of light on plant growth?

Accepted Answer

Varying the amount of water given to each plant

Chapter 1: The Study of Life – Foundations of General Biology

Study Guide - Practice Questions

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