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Flashcards in topnotch generalities Deck (521)
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1

microorganisms
enumerate

bacteria
protozoa
microscopic algae
fungi

2

acellular infections agents enumerate

viruses
viroids
prions

3

mobile genetic elements enumerate

bacteriophages
plasmids
transposons

4

animal parasites enumerate

nematodes
trematodes
cestodes

5

roundworms

nematodes

6

flukes

trematodes

7

tapeworms

cestodes

8

Non-SI unit for sedimentation rate

Svedberg unit

9

is the rate at which particles of a given size and shape travel to the bottom of the tube under centrifugal force

svedberg unit

10

this reflects at which a molecule sediments under the centrifugal force

svedberg unit

11

svedberg is a measure of time defined exactly

10^-13 s (100 fs)

12

replicates through binary fission

bacteria

13

how does fungi replicate

budding or mitosis

14

how does protozoa and helminths replicate

mitosis

15

protein capsid

viruses

16

rigid wall containing peptidoglcan

bacteria

17

rigid wall contaning chitin

fungi

18

flexible membrane

protozoa and helminths

19

Which of the following microorganisms lack membrane sterols

bacteria

20

Which organism has abundant sterols in membrane, 10% of dry weight

yeast

21

mobile genetic elements

transposons

22

Jumping genes

transposons

23

obligate intracellular parasites of plants
acellular
with naked RNA
no human diseases known

viroids

24

Transposons are DNA pieces that move readily from one site to another between DNA of what type of organisms

bacteria
plasmids
bacteriophages

25

code for drug-resistant enzymes , toxins or metabolic enzymes

transposons

26

cause mutations in gene into which they insert or alter expression of nearby genes

transposons

27

Which of the following infectious agents lack nucleic acids?
a. viruses
b. bacteria
c. viroids
d. prions

d. prions
protein only

28

noncellular infectious proteins

prions

29

naked proteins that have the same amino sequence as certain human cell surface proteins but folded differently

prions

30

prions are resistant to

nucleases
proteases
many chemicals and
normal autoclaving