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

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + \text{light energy} \rightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Q: Which equation represents the light-dependent reactions of photosynthesis?

$$2\ \mathrm{H}_2\mathrm{O} + \text{light} \rightarrow \mathrm{O}_2 + \mathrm{ATP} + \mathrm{NADPH}$$

Question 1

Which of the following best explains why viruses are not considered living organisms?

Accepted Answer

They contain genetic material but lack a metabolism and cannot reproduce independently.

Question 2

A scientist is studying a virus that can leave the host cell without causing cell lysis. Which structural feature is most likely responsible for this ability?

Accepted Answer

An envelope derived from the host cell membrane

Question 3

Which protein is NOT involved in the HIV life cycle?

Accepted Answer

Ribulose bisphosphate carboxylase (Rubisco)

Question 4

A patient is prescribed antibiotics for a bacterial infection but stops taking them after feeling better. What is the most likely consequence of this action?

Accepted Answer

Development of antibiotic-resistant bacteria due to incomplete elimination of the infection

Question 5

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

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{light energy} ightarrow \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\ \mathrm{O}_2$$

Question 6

Which of the following best describes the difference between bioaccumulation and biomagnification?

Accepted Answer

Bioaccumulation is the buildup of toxins in an individual organism over its lifetime, while biomagnification is the increase in toxin concentration at higher trophic levels in a food web.

Question 7

Which of the following is a shared derived trait (synapomorphy) linking green algae and land plants?

Accepted Answer

Chlorophyll for photosynthesis

Question 8

Which statement best explains why mitochondria were acquired before plastids in eukaryotic evolution?

Accepted Answer

All eukaryotic cells contain mitochondria, but not all contain plastids.

Question 9

Which of the following best describes the function of accessory pigments in photosynthesis?

Accepted Answer

They allow plants to absorb wavelengths of light that chlorophyll A cannot.

Question 10

A plant is observed to fix carbon dioxide at night and keep its stomata closed during the day. Which photosynthetic pathway is this plant using?

Accepted Answer

CAM photosynthesis

Question 11

Which of the following is a reason why Plasmodium continues to pose a great risk to human health?

Accepted Answer

It has multiple life cycle stages, each with different forms and characteristics, making it difficult to target all stages.

Question 12

Which equation represents the light-dependent reactions of photosynthesis?

Accepted Answer

$$2\ \mathrm{H}_2\mathrm{O} + 	ext{light} ightarrow \mathrm{O}_2 + \mathrm{ATP} + \mathrm{NADPH}$$

Question 13

Which of the following best explains why pollen grains were an important adaptation for successful reproduction on land?

Accepted Answer

They allow male gametes to be transported by wind or animals without the need for water.

Question 14

Which of the following statements correctly contrasts C3 and C4 plants?

Accepted Answer

C3 plants use Rubisco to fix carbon dioxide into a 3-carbon compound, while C4 plants use PEP carboxylase to fix carbon dioxide into a 4-carbon compound.

Question 15

Which of the following is a function performed by bacteria that is essential for human survival?

Accepted Answer

Nitrogen fixation

Question 16

Which of the following best describes the difference between primary and secondary endosymbiosis?

Accepted Answer

Primary endosymbiosis involves a eukaryotic cell engulfing a prokaryotic cell, while secondary endosymbiosis involves a eukaryotic cell engulfing another eukaryotic cell.

Question 17

Which of the following is a characteristic unique to Archaea compared to Bacteria?

Accepted Answer

Unique membrane lipids and cell wall chemistry

Question 18

A prokaryote that uses light as its energy source and CO2 as its carbon source is best classified as which of the following?

Accepted Answer

Photoautotroph

Question 19

Which of the following best describes the movement of prokaryotic flagella compared to eukaryotic flagella?

Accepted Answer

Prokaryotic flagella move in a circular motion, while eukaryotic flagella move back and forth.

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