Q: Which equation correctly represents the process of photosynthesis occurring in chloroplasts?

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

Question 1

Which of the following statements best describes the Cell Theory?

Accepted Answer

All living organisms are composed of cells, cells are the basic unit of life, and all cells arise from pre-existing cells.

Question 2

Which feature is present in eukaryotic cells but absent in prokaryotic cells?

Accepted Answer

Membrane-bound organelles such as the nucleus

Question 3

A scientist discovers a unicellular organism living in a hot spring at 90°C. It lacks a nucleus and has a cell wall that is not made of peptidoglycan. To which domain does this organism most likely belong?

Accepted Answer

Archaea

Question 4

Which of the following best explains why compartmentalization in eukaryotic cells increases the efficiency of chemical reactions?

Accepted Answer

It allows incompatible chemical reactions to occur simultaneously in separate organelles.

Question 5

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 6

A bacterial cell is placed in a hypotonic solution. Which structure prevents the cell from bursting due to osmotic pressure?

Accepted Answer

Cell wall

Question 7

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Modifying, sorting, and packaging proteins for secretion or delivery to other organelles

Question 8

Which equation correctly represents the process of photosynthesis occurring in chloroplasts?

Accepted Answer

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

Question 9

Which structure in prokaryotic cells is responsible for protein synthesis?

Accepted Answer

Ribosome

Question 10

A mutation causes a eukaryotic cell to lack functional lysosomes. Which cellular process would be most directly affected?

Accepted Answer

Intracellular digestion and recycling of macromolecules

Question 11

Which of the following statements about bacterial chromosomes is correct?

Accepted Answer

They are circular and located in the nucleoid region.

Question 12

Which organelle is abundant in pancreatic cells that export digestive enzymes, and why?

Accepted Answer

Rough endoplasmic reticulum, because it is studded with ribosomes for protein synthesis.

Question 13

Which of the following is NOT a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Synthesizing ATP

Question 14

Which of the following best describes the role of peptidoglycan in bacterial cells?

Accepted Answer

It is a modified polysaccharide that provides structural support to the cell wall.

Question 15

A plant cell stores starch in a large organelle. Which organelle is this, and what is its primary function?

Accepted Answer

Vacuole; storage of substances such as starch and water

Question 16

Which of the following is a real-world application of cell biology knowledge in medicine?

Accepted Answer

Understanding how pathogenic bacteria alter the cytoskeleton in human cells to cause disease

Question 17

Which of the following statements about microbial diversity in the ocean is correct?

Accepted Answer

There are approximately $$10^6$$ cells per milliliter of seawater, and over 99% are uncultivated.

Question 18

Which of the following structures is found in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosome

Question 19

Methanopyrus kandlerii is an ancient methanogen that produces methane ($$CH_4). $$Which domain does it belong to, and what is its ecological significance?

Accepted Answer

Archaea; contributes to global climate change by producing greenhouse gases

Biology 112: Introduction to Cells – Structure, Function, and Diversity

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