Question 1

Which of the following best describes the relationship between cell size and surface area, and why is this relationship important for cellular function?

Accepted Answer

As cell size increases, volume increases faster than surface area, which can limit the rate of exchange of materials across the membrane.

Question 2

Which organelle is responsible for producing most of the ATP during the electron transport chain, and what is the name of the protein complex involved?

Accepted Answer

Mitochondrion; ATP synthase

Question 3

A scientist is using a microscope to observe the internal structure of a cell in high detail. Which type of microscopy should they use, and why?

Accepted Answer

Transmission electron microscopy, because it allows visualization of internal cell structures at very high resolution.

Question 4

Which of the following is NOT a shared characteristic between living and nonliving things?

Accepted Answer

Ability to maintain homeostasis

Question 5

Which of the following elements is most abundant in the human body?

Accepted Answer

Oxygen

Question 6

A molecule has a partial positive charge on one end and a partial negative charge on the other. Which concept explains this property, and what type of bond is most likely present?

Accepted Answer

Polarity; hydrogen bond

Question 7

Which of the following best describes the process of diffusion?

Accepted Answer

Movement of molecules from an area of high concentration to low concentration, without requiring energy.

Question 8

Which of the following substances can freely pass through the plasma membrane without assistance?

Accepted Answer

Small nonpolar molecules

Question 9

A cell is placed in an isotonic solution. What will happen to the cell?

Accepted Answer

The cell will remain the same size as water moves in and out equally.

Question 10

Which of the following best describes the purpose of glycolysis?

Accepted Answer

To break down glucose into pyruvate and generate ATP and NADH.

Question 11

During the citric acid cycle, which electron carriers are produced, and from where do they get their electrons?

Accepted Answer

NADH and FADH$$_2$$; electrons are obtained from the oxidation of acetyl-CoA.

Question 12

Which of the following best explains why radioisotope technology is important in biological research?

Accepted Answer

It allows scientists to track the movement of molecules within organisms.

Question 13

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modification, sorting, and packaging of proteins

Question 14

Which type of muscle tissue is found in the stomach, and what is its primary function?

Accepted Answer

Smooth muscle; involuntary contraction for digestion

Question 15

Which of the following best describes the scientific method in order?

Accepted Answer

Observation, hypothesis, experiment, analysis, conclusion

Question 16

Which of the following is true about active transport across the plasma membrane?

Accepted Answer

It moves substances against their concentration gradient using ATP.

Question 17

Which of the following best describes the difference between an element and a molecule?

Accepted Answer

An element is a pure substance consisting of only one type of atom, while a molecule is composed of two or more atoms bonded together.

Question 18

Which of the following best describes homeostasis?

Accepted Answer

The process by which organisms maintain a stable internal environment.

Question 19

Which of the following types of connective tissue is found in tendons and ligaments, and what is its primary function?

Accepted Answer

Dense connective tissue; provides strength and flexibility

Question 20

Which type of cell junction allows for the passage of ions and small molecules directly between adjacent cells?

Accepted Answer

Gap junctions

Human Biology Exam 1 Study Guide: Step-by-Step Guidance

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