Question 1

Which of the following statements best describes the location and structure of DNA in a typical bacterial cell?

Accepted Answer

DNA is circular and found in the nucleoid region of the cytoplasm.

Question 2

Which of the following is NOT a feature shared by all prokaryotic and eukaryotic cells?

Accepted Answer

Contain a nucleus that stores the genetic material.

Question 3

A scientist isolates a cell that is 2 μm in size, lacks a nucleus, and has a cell wall. This cell is most likely a:

Accepted Answer

Bacterium.

Question 4

Which of the following best explains why Archaea are considered extremophiles?

Accepted Answer

They thrive in environments with extreme conditions such as high temperature, salinity, or acidity.

Question 5

Which of the following combinations correctly describes a chemoheterotroph?

Accepted Answer

Uses preformed organic molecules as both energy and carbon sources.

Question 6

Cyanobacteria are classified as photoautotrophs. Which of the following best describes their metabolism?

Accepted Answer

They use sunlight as an energy source and CO$$_2 as a $$carbon source.

Question 7

Which of the following is a primary difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotes have DNA that floats freely in the cytoplasm and are significantly smaller than eukaryotic cells.

Question 8

Which of the following best describes the nutritional classification of humans?

Accepted Answer

Chemoorganoheterotrophs.

Question 9

Which of the following is a correct statement about the domains of life?

Accepted Answer

Bacteria and Archaea are both prokaryotic domains.

Question 10

Which of the following is NOT a possible energy or carbon source for prokaryotes?

Accepted Answer

ATP from mitochondria.

Question 11

Which of the following statements about the structure of a typical bacterial cell is correct?

Accepted Answer

Its DNA is found in the nucleoid region and it has small 70S ribosomes.

Question 12

Which of the following best describes the function of the bacterial capsule?

Accepted Answer

It protects the cell from desiccation and helps evade the immune system.

Question 13

Which of the following is true regarding the ribosomes found in prokaryotic cells?

Accepted Answer

They are smaller (70S) and are the site of protein synthesis.

Question 14

Which of the following best describes the cell wall composition of most bacteria?

Accepted Answer

Peptidoglycan.

Question 15

Which of the following is a correct pairing of prokaryotic structure and its function?

Accepted Answer

Nucleoid – storage of genetic material.

Prokaryotes, Cell Types, and Prokaryotic Metabolism: Structured Study Notes

Study Guide - Practice Questions