Question 1

Which of the following best describes the concept of 'emergence' in biological systems?

Accepted Answer

Emergence describes how new properties arise at successive levels of biological organization that are not present at lower levels.

Question 2

A scientist wants to test the effect of a new fertilizer on plant growth. Which step of the scientific method is she performing when she measures the height of plants after applying the fertilizer?

Accepted Answer

Making observations and collecting data

Question 3

Which functional group is most likely to increase the solubility of an organic molecule in water?

Accepted Answer

Hydroxyl group ($$\mathrm{OH})$$

Question 4

Which process is responsible for breaking down polymers into monomers by adding water?

Accepted Answer

Hydrolysis

Question 5

A patient is diagnosed with diabetes mellitus, a disease characterized by high blood glucose levels. Which macromolecule is directly involved in the regulation of blood glucose?

Accepted Answer

Carbohydrates

Question 6

Which of the following best explains why phospholipids are essential for cell membrane structure?

Accepted Answer

Phospholipids have both hydrophilic and hydrophobic regions, allowing them to form bilayers in water.

Question 7

Which level of protein structure is primarily stabilized by hydrogen bonds between backbone atoms, forming alpha helices and beta sheets?

Accepted Answer

Secondary structure

Question 8

A mutation changes the sequence of amino acids in a protein. Which level of protein structure is directly affected first?

Accepted Answer

Primary structure

Question 9

Which of the following is a correct representation of the central dogma of molecular biology?

Accepted Answer

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

Question 10

Which of the following best describes the role of homeostasis in living organisms?

Accepted Answer

Homeostasis enables organisms to maintain stable internal conditions despite changes in the external environment.

Question 11

Which of the following is an example of an isomer?

Accepted Answer

Glucose and fructose, which have the same molecular formula but different structures

Question 12

Which macromolecule contains the genetic information necessary for inheritance?

Accepted Answer

Nucleic acids

Question 13

Which of the following is a function of carbohydrates in living organisms?

Accepted Answer

Short-term energy storage and structural support

Question 14

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

Accepted Answer

Unsaturated fatty acids have double bonds, causing kinks in the chain, while saturated fatty acids have only single bonds.

Question 15

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Storing genetic information

Question 16

Which of the following best explains why water is essential for life?

Accepted Answer

Water's polarity allows it to dissolve many substances and participate in chemical reactions.

Question 17

Which of the following is a correct description of a dehydration synthesis reaction?

Accepted Answer

A reaction that joins two monomers together by removing a water molecule

Question 18

A researcher is studying the effect of temperature on enzyme activity. She finds that at high temperatures, the enzyme loses its function. What is the most likely explanation?

Accepted Answer

The enzyme is denatured, losing its three-dimensional structure.

Question 19

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA is double-stranded and contains thymine, while RNA is single-stranded and contains uracil.

Question 20

Which of the following is an example of a biological interaction at the molecular level?

Accepted Answer

Enzyme binding to a substrate to catalyze a reaction

General Biology: Core Concepts, Biomolecules, and Biological Organization

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