Q: Which of the following equations correctly represents the overall process of photosynthesis?

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

Question 1

Which of the following best describes why carbon is central to the structure of all complex biological molecules?

Accepted Answer

It can form up to four covalent bonds, allowing for a diversity of stable structures.

Question 2

A scientist observes two water molecules interacting. What type of bond is most likely forming between them?

Accepted Answer

Hydrogen bond

Question 3

Which of the following best explains why a sudden drop in blood pH can be harmful to the human body?

Accepted Answer

Proteins can denature, losing their structure and function.

Question 4

Which of the following is a defining characteristic of an organic molecule?

Accepted Answer

It contains carbon atoms, typically bonded to hydrogen.

Question 5

Which process is responsible for building larger biological molecules by removing water?

Accepted Answer

Dehydration synthesis

Question 6

Glycogen is classified as which type of macromolecule?

Accepted Answer

Carbohydrate (polysaccharide)

Question 7

A patient with a liver disorder is found to have an increased number of lysosomes in their liver cells. What is the most likely reason for this observation?

Accepted Answer

Lysosomes are involved in breaking down and recycling cellular waste.

Question 8

Which of the following best describes the head of a phospholipid in the cell membrane?

Accepted Answer

Hydrophilic

Question 9

A red blood cell is placed in a 1% salt solution. What type of solution is this relative to the cell, and what will happen to the cell?

Accepted Answer

The solution is hypertonic; the cell will shrink.

Question 10

Which of the following equations correctly represents the overall process of photosynthesis?

Accepted Answer

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

Question 11

During the electron transport chain (ETC) in cellular respiration, what is the primary role of the electrons?

Accepted Answer

They move through enzymes, helping to generate a proton gradient that drives ATP synthesis.

Question 12

Which organelle is present in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosome

Question 13

Which of the following best describes the relationship between transcription and translation in the central dogma of molecular biology?

Accepted Answer

Transcription produces mRNA, which is then read during translation to assemble amino acids into proteins.

Question 14

Which of the following is true about unsaturated fats?

Accepted Answer

They are usually liquid at room temperature due to the presence of double bonds.

Question 15

Which of the following best defines metabolism?

Accepted Answer

The sum of all chemical reactions occurring in an organism.

Question 16

A cell is observed under a microscope forming a cell plate during cytokinesis. What type of cell is this, and in which phase is it most likely?

Accepted Answer

Plant cell in telophase

Question 17

Which of the following best describes the function of an enzyme in a chemical reaction?

Accepted Answer

It acts as a catalyst, speeding up the reaction without being consumed.

Question 18

Which of the following is the correct equation for glycolysis?

Accepted Answer

$$C_6H_{12}O_6$ + 2NAD^+ + 2ADP + 2P_i ightarrow 2	ext{pyruvate} + 2NADH + 2ATP + 2H_2O$$

Question 19

Which statement best describes what happens to energy released as heat during cellular work?

Accepted Answer

It is lost to the environment and the universe.

Question 20

Which of the following statements about the Calvin cycle is correct?

Accepted Answer

It synthesizes glucose and does not require light directly.

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