Biology & Microbiology - Molecular And Microbiology; Quizlevel3

1

Free

A chemical that denatures proteins is MOST likely to be classified as a(n) ________ agent

2

Free

Which of these statements is/are TRUE?

3

Free

An antibiotic that increased the activity of ________ would likely result in cell death

4

Free

A microbe growing in a refrigerator is likely

5

Free

Consider solution A (pH 6) and solution B (pH 9). Which of the following statements is CORRECT?

6

The addition of thioglycylate into a growth medium would NOT support the growth of a(n)

7

What temperature is most commonly used for autoclaves to sterilize growth media and other devices prior to experimentation?

8

The MOST effective antibiotics in preventing growth of disease-causing bacteria are

9

Most mesophilic organisms can grow in a temperature range of

10

Cell density in a chemostat is controlled by

11

The number of colonies obtained in a plate count does NOT depend on the

12

Many aromatic compounds used for growth substrates by bacteria are broken down during high heat autoclaving. Which is the BEST way to sterilize these aqueous solutions?

13

An agar plate for counting colonies and maximizing statistical validity should ideally contain

14

Where would it be best to isolate bacteria from to study the mechanism of the sodium motive force?

15

Relative to enzymes in mesophilic microorganisms, which of the following is NOT characteristic of enzymes in psychrophiles?

16

Bacteria that are able to grow in humans and cause disease have likely evolved to be

17

Optical density and viable cell concentration are LEAST proportional to each other during

18

To determine viable cell counts of a heat-sensitive bacterial isolate, which cell counting method would be best to AVOID?

19

The time between inoculation and the beginning of growth is usually called the

20

The time interval required for the formation of two cells from one is called the

21

Enumerating cells in a biofilm is especially challenging for

22

A bacterium that lacks the mreB gene will have a ________ shape

23

Which is most abundant and active in divisome complexes?

24

The process by which two cells arise from one is known as

25

Which of the following is/are transferred to daughter cells during cell division?

26

Explain why GC-rich DNA requires a higher temperature to denture or melt than AT-rich DNA and hypothesize as to why the GC content of chromosomes in microorganisms from different environments varies widely

27

Speculate on why it can be problematic to copy and express genes from Bacteria into Eukarya

28

Speculate why the half-life of mRNA is short, while the half-lives of rRNA and tRNA are long

29

Explain how Escherichia coli can grow with a doubling time of 20 minutes when chromosome replication takes 40 minutes

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Biology & Microbiology - Molecular And Microbiology; Quizlevel3

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