Question 1

Which of the following best describes the concept of a 'consumer' in a biological ecosystem?

Accepted Answer

An organism that obtains energy by eating other organisms.

Question 2

Which of the following correctly lists the levels of biological organization from smallest to largest?

Accepted Answer

Cell, tissue, organ, organ system, organism

Question 3

In the context of evolution, what does the term 'survival of the fittest' most accurately refer to?

Accepted Answer

Individuals that are best adapted to their environment are more likely to survive and reproduce.

Question 4

Which of the following is NOT a domain in the classification of life?

Accepted Answer

Plantae

Question 5

A scientist discovers a fossil in a deep layer of sedimentary rock. According to the principle of superposition, what can be inferred about the age of this fossil compared to fossils found in layers above it?

Accepted Answer

It is older than fossils in layers above.

Question 6

Which equation best represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 7

Which of the following factors can cause a gene pool to deviate from Hardy-Weinberg equilibrium?

Accepted Answer

Gene flow between populations

Question 8

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Unsaturated fatty acids contain one or more double bonds, while saturated fatty acids do not.

Question 9

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA is a double helix with antiparallel strands.

Question 10

Which of the following is true about protein denaturation?

Accepted Answer

Denaturation involves the loss of protein structure and function.

Question 11

A patient is diagnosed with a genetic disorder caused by a mutation in a gene. Which of the following best explains how mutations can affect genetic variation in a population?

Accepted Answer

Mutations introduce new alleles, increasing genetic variation.

Question 12

Which of the following correctly matches the nitrogenous bases with their pairing in DNA?

Accepted Answer

Adenine pairs with thymine, guanine pairs with cytosine.

Question 13

Which of the following is a carbohydrate polymer found in plants and used for energy storage?

Accepted Answer

Starch

Question 14

Which of the following best explains why genetic drift has a greater effect in small populations?

Accepted Answer

Random changes in allele frequencies are more likely to significantly impact small populations.

Question 15

Which of the following is NOT a function of nucleic acids?

Accepted Answer

Catalyzing chemical reactions

Question 16

Which of the following best describes the process of natural selection?

Accepted Answer

Individuals with traits best suited to the environment are more likely to survive and reproduce.

Question 17

Which of the following is true about the structure of amino acids?

Accepted Answer

The R group determines the properties of each amino acid.

Question 18

Which of the following is a correct statement about the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose.

Question 19

Which of the following best describes a peer-review process in scientific research?

Accepted Answer

A process where experts in the field evaluate the quality and validity of research before publication.

Question 20

A population of beetles is exposed to a pesticide. After several generations, most beetles are resistant to the pesticide. Which evolutionary mechanism best explains this change?

Accepted Answer

Natural selection

General Biology Study Guide: Core Concepts and Biological Molecules

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