Q: Which equation correctly represents the process of cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{energy}$$

Q: During photosynthesis, which equation best represents the overall chemical reaction?

$$6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{light energy} \rightarrow \mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$}$$

Q: Which equation represents the hydrolysis of ATP?

$$\mathrm{ATP} + \mathrm{H_2O} \rightarrow \mathrm{ADP} + \mathrm{P_i} + \text{energy}$$

Question 1

Which of the following best describes the role of water in biological systems?

Accepted Answer

Water is a polar molecule that facilitates hydrogen bonding, acts as a solvent, and participates directly in many biochemical reactions.

Question 2

Which equation correctly represents the process of cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{energy}$$

Question 3

A patient is suffering from dehydration. Which property of water is most critical for maintaining electrolyte balance in their cells?

Accepted Answer

Water's polarity, which allows it to dissolve and transport ions.

Question 4

Which macromolecule is primarily responsible for catalyzing biochemical reactions in living organisms?

Accepted Answer

Proteins

Question 5

During photosynthesis, which equation best represents the overall chemical reaction?

Accepted Answer

$$6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{light energy} ightarrow \mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$}$$

Question 6

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

Accepted Answer

Carbon can form up to four covalent bonds, allowing for complex and diverse molecular structures.

Question 7

A mutation causes a change in the sequence of nucleotides in a gene. Which process is most directly affected by this mutation?

Accepted Answer

Protein synthesis

Question 8

Which organelle is responsible for producing ATP through cellular respiration?

Accepted Answer

Mitochondrion

Question 9

A person is experiencing muscle cramps due to low calcium levels. Which cellular process is most likely disrupted?

Accepted Answer

Signal transduction in muscle contraction

Question 10

Which of the following best describes the function of the plasma membrane in animal cells?

Accepted Answer

It regulates the movement of substances into and out of the cell, maintaining homeostasis.

Question 11

Which equation represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H_2O} ightarrow \mathrm{ADP} + \mathrm{P_i} + 	ext{energy}$$

Question 12

Which of the following scenarios best illustrates the concept of homeostasis?

Accepted Answer

A person sweating to cool down when their body temperature rises.

Question 13

Which process is directly responsible for the movement of oxygen from the lungs into the bloodstream?

Accepted Answer

Simple diffusion

Question 14

A scientist discovers a new organism that can survive in extreme heat and acidity. Which cellular adaptation is most likely present?

Accepted Answer

Enzymes with increased stability due to more ionic and covalent bonds.

Question 15

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

Enzymes have active sites with unique shapes that fit only specific substrates.

Question 16

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

Accepted Answer

DNA is a double helix composed of nucleotides with complementary base pairing.

Question 17

A cell placed in a hypertonic solution will:

Accepted Answer

Lose water and shrink.

Question 18

Which of the following best describes the function of mitochondria in animal cells?

Accepted Answer

They generate ATP through oxidative phosphorylation.

Question 19

Which process is responsible for the synthesis of proteins from mRNA?

Accepted Answer

Translation

Question 20

A patient with a genetic disorder has a defect in the sodium-potassium pump. Which equation best represents the normal function of this pump?

Accepted Answer

$$3\mathrm{Na^+}_{	ext{in}} + 2\mathrm{K^+}_{	ext{out}} + 	ext{ATP} ightarrow 3\mathrm{Na^+}_{	ext{out}} + 2\mathrm{K^+}_{	ext{in}} + 	ext{ADP} + \mathrm{P_i}$$

General Biology I (BIO 170) – Course Overview and Study Guide

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