Bac Growth and Genetics Flashcards Preview

POM Exam 1 > Bac Growth and Genetics > Flashcards

Flashcards in Bac Growth and Genetics Deck (23):
1

Phases of bacterial growth, in order?

Lag phase, log phase, stationary phase

2

What happens during lag phase?

no growth

3

What happens during log phase?

exponential growth

4

What happens during stationary phase?

growth rate = death rate

5

Mycobacterium growth category?

Obligate aerobe
(TB in lungs)

6

Bacillus growth category?

Obligate aerobe

7

Nocardia growth category?

Obligate aerobe

8

GI microbiome bacteria fall under what growth category?

Obligate anaerobes

9

Facultative anaerobes

Really like oxygen but can grow with it; most versatile

10

Facultative anaerobes are often gram ___

negative

11

Aerotolerant anaerobes

really like to be without oxygen but won't die with oxygen

12

Microaerophiles

like some oxygen but not a lot

13

Most common carbon source is...

glucose

14

Why do bacteria have more mutations?

No 3'-5' exonuclease activity in their DNA polymerases

15

What happens if there is a change in a surface protein gene?

Wrong amino acid sequence can lead to antigen variation

16

What happens if there is a change in a gene involving an antibiotic target?

Resistance! Drug won't recognize

17

How are plasmids replicated?

Autonomously

18

Plasmids often contain virulence factors and antibiotic resistance genes. True or False?

True

19

Vertical gene transmission

parent --> progeny

20

Horizontal gene transmission

foreign donor bacteria --> recipient bacteria

21

How does phage transduction work?

Small fraction of phages have bacterial DNA by mistake, lysis happens, new cell gets infected with previous host bacterial DNA

22

What is transformation?

naked DNA released by lysis lands on another cell

23

What is conjugation?

Special pilus transmits DNA between cells, provides protection during transfer