Question 1

Which of the following is NOT a function of proteins in biological systems?

Accepted Answer

Storing genetic information

Question 2

A concentration gradient across a membrane is established when:

Accepted Answer

The concentration of one of the substances is high and of the other is low

Question 3

Penicillin and similar antibiotics cause bacterial cell death by inhibiting the biosynthesis of which structure?

Accepted Answer

Cell wall

Question 4

Which of the following molecules can cross the plasma membrane WITHOUT the help of transport proteins?

Accepted Answer

Cortisol

Question 5

Anchorage proteins are primarily involved in which cellular process?

Accepted Answer

Binding the cell to the extracellular matrix

Question 6

Which property of archaeal membranes contributes most to their ability to survive in extreme temperatures?

Accepted Answer

Branched isoprenoid chains in lipids

Question 7

Which of the following is most directly associated with osmosis in biological membranes?

Accepted Answer

Aquaporins

Question 8

Which of the following is INCORRECTLY matched to its function?

Accepted Answer

Ribosomes - Energy production

Question 9

Pili are composed of which type of biological macromolecule?

Accepted Answer

Proteins

Question 10

Which of the following is NOT a function of bacterial capsules that contributes to pathogenicity?

Accepted Answer

Intracellular signaling

Question 11

In gram-negative bacteria, what is the primary function of MotA/MotB proteins in the flagellar structure?

Accepted Answer

They form part of torque-generating stator units.

Question 12

Which of the following statements about fimbriae is TRUE?

Accepted Answer

None of the above.

Question 13

Which of the following statements about bacterial flagellar arrangements is TRUE?

Accepted Answer

Peritrichous: flagella over the entire surface

Question 14

Which of the following is NOT a characteristic of peptidoglycan?

Accepted Answer

It is only found in Gram-negative bacteria.

Question 15

Which of the following characteristics describes prokaryotes?

Accepted Answer

They primarily divide through binary fission.

Question 16

What is the most common primary energy source for the movement of flagella in prokaryotic cells?

Accepted Answer

Proton motive force (PMF)

Question 17

Which of the following triggers the germination of bacterial endospores?

Accepted Answer

Availability of nutrients such as amino acids and sugars.

Question 18

Which structure is primarily used by bacteria for the transfer of DNA from one cell to another?

Accepted Answer

Pili

Question 19

Which of the following best describes the hook region of the bacterial flagella?

Accepted Answer

It connects the filament of the flagellum and the basal body.

Question 20

Assume you inoculated 50 ml of milk with 10 Lactobacillus acidophilus cells to prepare curd. If the generation time is 90 minutes, how many cells will be present after 9 hours of incubation? Use the formula $$N = N_0$ 	imes 2^n$$, where $$n = \frac{t}{g}$$, $$t is $$total time, $$g is $$generation time, $$N_0 is $$initial cell number, and $$N is $$final cell number.

Accepted Answer

1280

Microbiology Assessment Study Guide: Chapters 5, 6 & 7

Guida di studio - Domande di pratica

Study guide - Flashcard