Q: Which equation 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 diverse molecular 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

A patient is diagnosed with acidosis, where their blood pH drops significantly. What is the most immediate danger to their cells?

Accepted Answer

Proteins may denature, disrupting cellular functions.

Question 4

Which of the following is true about dehydration synthesis?

Accepted Answer

It removes water to build larger molecules from smaller ones.

Question 5

Glycogen is best classified as which type of macromolecule?

Accepted Answer

Polysaccharide (carbohydrate)

Question 6

Which organelle is present in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosome

Question 7

A doctor examines liver tissue and expects to find an abundance of which organelle due to its role in breaking down waste and toxins?

Accepted Answer

Lysosome

Question 8

Which statement correctly describes the head of a phospholipid in the cell membrane?

Accepted Answer

It is hydrophilic and interacts with water.

Question 9

Unsaturated fats are typically liquid at room temperature. What structural feature causes this property?

Accepted Answer

They contain double bonds in their fatty acid chains.

Question 10

A human red blood cell is placed in a 1% salt solution. What will happen to the cell, and why?

Accepted Answer

It will shrink because the solution is hypertonic.

Question 11

Which equation correctly represents the overall process of photosynthesis?

Accepted Answer

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

Question 12

During the electron transport chain (ETC) in cellular respiration, what is the main result of hydrogen ions (H$$^+) $$accumulating on one side of the mitochondrial membrane?

Accepted Answer

They create a gradient that drives ATP synthesis through ATP synthase.

Question 13

Which process is described by the equation below?

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

Accepted Answer

Glycolysis

Question 14

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

Accepted Answer

Plant cell in telophase

Question 15

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 16

Which of the following is the best definition of metabolism?

Accepted Answer

The sum of all chemical reactions occurring in an organism.

Question 17

Which of the following statements about enzymes is correct?

Accepted Answer

They act as catalysts, speeding up chemical reactions without being consumed.

Question 18

Which of the following best explains why changing the pH of a solution can be harmful to living organisms?

Accepted Answer

It can denature proteins, disrupting their function.

Question 19

Which of the following is a requirement for a molecule to be classified as organic?

Accepted Answer

It must contain carbon atoms, typically bonded to hydrogen.

Question 20

What is the main function of the cell membrane?

Accepted Answer

It is semi-permeable, allowing selective passage of substances.

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