Question 1

Which of the following best describes an emergent property in biological systems?

Accepted Answer

A property that arises from the interaction of individual components, resulting in new characteristics not found in the parts alone.

Question 2

Which of the following statements about DNA is correct?

Accepted Answer

DNA is composed of a sugar-phosphate backbone and nitrogenous bases, forming a double helix structure.

Question 3

In the hierarchy of life, which of the following is the smallest unit that can be considered alive?

Accepted Answer

Cell

Question 4

Which of the following is a key difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 5

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

The oxygen atom is more electronegative than the hydrogen atoms, creating a partial negative charge on oxygen and partial positive charges on hydrogen.

Question 6

A scientist is testing the effect of a new drug on blood pressure. She randomly assigns subjects to two groups: one receives the drug, the other receives a placebo. Neither the subjects nor the experimenters know which group receives the drug. What type of experimental design is this?

Accepted Answer

Double-blind

Question 7

Which of the following equations correctly represents the relationship between pH and hydrogen ion concentration?

Accepted Answer

$$ \mathrm{pH} = -\log_{10}[\mathrm{H}^+] $$

Question 8

Which of the following is NOT a property of water that is critical for life on Earth?

Accepted Answer

Water is hydrophobic and repels most biological molecules.

Question 9

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

A reaction in which two monomers are joined together by removing a molecule of water.

Question 10

Which of the following statements about ATP is correct?

Accepted Answer

ATP stores energy in its phosphate bonds and is used as the primary energy currency in cells.

Question 11

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modifying, packaging, and sorting proteins for secretion or delivery to other organelles.

Question 12

Which of the following best describes the Fluid Mosaic Model of the plasma membrane?

Accepted Answer

A dynamic structure with proteins embedded in a phospholipid bilayer, allowing lateral movement of components.

Question 13

Which of the following is true about selective permeability of biological membranes?

Accepted Answer

The membrane allows certain molecules to pass while restricting others, often facilitated by specific proteins.

Question 14

Which of the following best describes active transport across a cell membrane?

Accepted Answer

Movement of molecules against their concentration gradient, requiring energy input, often from ATP.

Question 15

Which of the following is a real-world example of cotransport in cells?

Accepted Answer

The sodium-glucose transporter uses the energy from sodium moving down its gradient to transport glucose against its gradient.

Question 16

Which of the following best describes the role of motor proteins in cells?

Accepted Answer

They convert chemical energy from ATP into mechanical work, moving vesicles and organelles along cytoskeletal fibers.

Question 17

Which of the following is a correct statement about the endosymbiosis hypothesis?

Accepted Answer

It proposes that mitochondria and chloroplasts originated from prokaryotic cells engulfed by ancestral eukaryotic cells.

Question 18

Which of the following best describes the function of a G-protein coupled receptor (GPCR) in cell signaling?

Accepted Answer

It binds to a signaling molecule, activates a G-protein, and initiates a signal transduction pathway inside the cell.

Question 19

Which of the following is a consequence of changing the primary structure of a protein?

Accepted Answer

It can alter the overall shape and function of the protein, potentially leading to loss of function or disease.

General Biology Exam 1 Study Guide: Foundations, Chemistry, Cells, and Membranes

Study Guide - Practice Questions

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