Question 1

Which of the following statements best distinguishes eukaryotic cells from prokaryotic cells?

Accepted Answer

Eukaryotic cells have a true nucleus, while prokaryotic cells lack a nucleus.

Question 2

Which of the following best describes the role of hydrogen bonds in water's unique properties?

Accepted Answer

Hydrogen bonds cause water molecules to stick together, resulting in high surface tension and cohesion.

Question 3

A scientist is studying a cell that contains ribosomes, a plasma membrane, and a cell wall, but no nucleus. Which type of organism is this cell most likely from?

Accepted Answer

A prokaryote, such as a bacterium

Question 4

Which of the following best explains why fungi are not classified as plants?

Accepted Answer

Fungi absorb their food from the environment, while plants create their own food using photosynthesis.

Question 5

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

Accepted Answer

Genetic information flows from DNA to RNA to protein.

Question 6

A cell is placed in a hypertonic solution. What will most likely happen to the cell?

Accepted Answer

Water will move out of the cell, causing it to shrink.

Question 7

Which of the following best describes the structure of a nucleotide found in DNA?

Accepted Answer

A phosphate group, a deoxyribose sugar, and a nitrogenous base

Question 8

Which of the following is an example of a covalent bond?

Accepted Answer

The bond between the hydrogen and oxygen atoms within a water molecule

Question 9

Which of the following statements about acids and bases is correct?

Accepted Answer

Acids have a pH less than 7, while bases have a pH more than 7.

Question 10

Which of the following best explains why carbon is considered the backbone of biological molecules?

Accepted Answer

Carbon can form four covalent bonds, allowing for a diversity of stable structures.

Question 11

A mutation causes a change in the primary structure of a protein. Which level of protein structure is directly affected by this mutation?

Accepted Answer

The sequence of amino acids (primary structure)

Question 12

Which of the following best describes the process of osmosis?

Accepted Answer

The movement of water across a selectively permeable membrane from low solute concentration to high solute concentration

Question 13

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Providing structural support and facilitating cell movement

Question 14

Which of the following best explains why enzymes are important in biological systems?

Accepted Answer

They lower the activation energy required for chemical reactions to proceed.

Question 15

Which of the following statements about the fluid mosaic model of membranes is correct?

Accepted Answer

Membranes are composed of a phospholipid bilayer with proteins embedded throughout.

Question 16

A cell is observed to have a high concentration of lysosomes. Which of the following is the most likely function of this cell?

Accepted Answer

Digesting and recycling cellular waste

Question 17

Which of the following best describes the relationship between genotype and phenotype?

Accepted Answer

Genotype refers to the genetic makeup, while phenotype refers to the observable traits.

Question 18

Which of the following is a real-world example of adhesion in water?

Accepted Answer

Water droplets sticking to the surface of a leaf

Question 19

Which of the following best explains why buffers are important in biological systems?

Accepted Answer

Buffers help maintain a stable pH, preventing harmful changes in acidity or alkalinity.

Question 20

Which of the following is a correct statement about the process of diffusion?

Accepted Answer

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

General Biology: Foundations, Cell Structure, and Biochemistry Study Notes

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