Question 1

Amoebas move and feed by the means of
A) shrinkage and expansion of the cell.
B) absorption.
C) temporary extensions of the cell.
D) motor-like flagella.

Accepted Answer

Amoebas move and feed through the process of creating temporary extensions of their cell body, known as pseudopodia or "false feet." These extensions allow them to envelop food particles and move by extending and retracting these pseudopods.

Question 2

Which of the following is not a practical use of fungi?
A) culinary uses
B) production of medicines such as penicillin
C) use as an iron supplement
D) use in biology and biotechnology research

Accepted Answer

Fungi are not used as iron supplements. They are widely used in cooking (e.g., mushrooms), medicine production (e.g., antibiotics like penicillin), and various biological and biotechnological research applications due to their unique properties and genetic makeup.

Question 3

Which stage of the life cycle shown is the sporophyte? 
A) stage A
B) stage B
C) stage C
D) stage D

Accepted Answer

D

Question 4

After reading the paragraph below, answer the question that follows.
Mould can be a huge problem in houses. In hot, humid climates like Florida entire houses have had to be thoroughly renovated or even completely abandoned due to the presence of moulds. Thus, understanding and mitigating mould contamination is of significant importance.
-What aspect of mould biology can be particularly problematic to people?
A) their ability to digest wood and thus weaken structures
B) their unsightly appearance
C) the formation of airborne spores which, if inhaled or ingested, can cause an allergic response
D) their slippery texture underfoot

Accepted Answer

Moulds produce airborne spores that can cause allergic reactions when inhaled or ingested, which is a significant health concern.

Question 5

Bacteria can transfer DNA in which three ways?
A) translocation, transduction, and conjunction
B) donation, transformation, and transduction
C) translation, conjunction, and transduction
D) transformation, transduction, and conjugation

Accepted Answer

Bacteria can transfer DNA through transformation (uptake of DNA from the environment), transduction (transfer of DNA by a bacteriophage), and conjugation (direct transfer of DNA between two bacterial cells).

Question 6

The three methods bacteria transfer DNA are all examples of
A) vertical gene transfer.
B) molecule transformation.
C) horizontal gene transfer.
D) translating.

Accepted Answer

The three methods bacteria use to transfer DNA (transformation, transduction, and conjugation) are all examples of horizontal gene transfer, where genetic material is passed between organisms in a manner other than through the vertical transmission (from parent to offspring).

Question 7

An F factor can exist as a
A) plasma membrane.
B) plasma.
C) recombinant DNA.
D) plasmid.

Accepted Answer

The F factor, also known as the fertility factor, can exist as a plasmid, which is a small DNA molecule that is physically separate from chromosomal DNA and can replicate independently. It is involved in bacterial conjugation, facilitating the transfer of genetic material between cells.

Question 8

What type of plasmid carries genes for enzymes that destroy antibiotics and therefore can be very dangerous for human medicine?
A) F plasmids
B) R plasmids
C) endospore
D) bacteria cell

Accepted Answer

R plasmids carry genes that provide resistance to antibiotics, making them a concern for human medicine as they can lead to the development of antibiotic-resistant bacteria.

Question 9

After reading the paragraphs below, answer the question(s) that follow(s).
In the 1930s, the Navajo nation treated sheep and cattle for ticks and other parasites by using concrete "dip tanks." Animals were herded through one end of the tank and out the other. Each day, the tanks were filled with 200 000 gallons of insecticide and any remaining chemicals were emptied onto the ground. The pesticide solution seeped into the ground, ditches, and pits around the tanks. This was a common practice in the United States during that period.
The EPA Emergency Response Team (ERT) was called to the Navajo nation during the 1990s to investigate. They concluded that bioremediation procedures were the best for this site. Certain types of bacteria are able to feed on and digest toxic organic substances, such as pesticides, and use them as fuel for cell respiration. The ERT distributed the pesticide-eating microorganisms through the contaminated soil to remove the chemical residues. Once the contaminants are degraded, these microorganism populations die off because they've used all of their food supply.
-There are some possible problems associated with the approach detailed above. Which of the following does not describe a potential environmental risk?
A) The bacteria used to decontaminate the affected soil could evolve into something harmful that persists after the initial problem has been solved.
B) The bacteria used to decontaminate the affected soil could outcompete and eliminate other beneficial bacteria within the soil.
C) The bacteria used to decontaminate the affected soil could partially degrade the toxic material, leaving different toxic material.
D) The bacteria used to decontaminate the affected soil could need to be reapplied continually.

Accepted Answer

The passage states that once the contaminants are degraded, the microorganism populations die off because they've used all of their food supply, implying no need for continual reapplication.

Quiz 8: Bacteria, Biodiversity of Protists and Fungi

Amoebas move and feed by the means of

Which of the following is not a practical use of fungi?

Which stage of the life cycle shown is the sporophyte?

Bacteria can transfer DNA in which three ways?

The three methods bacteria transfer DNA are all examples of

An F factor can exist as a

What type of plasmid carries genes for enzymes that destroy antibiotics and therefore can be very dangerous for human medicine?