exam 2

Question 1

B-lactamase is an enzyme for:

Answer 1

antibiotic resistance

Question 2

In postzygotic isolation:

Answer 2

Hybrid offspring of mating between different species do not survive

Question 3

If a body structure is on the dorsal axis, this tells us it is located:

Answer 3

on your back

Question 4

Which of the following is true of evolution?

Answer 4

Populations evolve, NOT the individuals

Question 5

Polyploidy means:

Answer 5

having more than two sets of chromosomes

Question 6

which of the following represents the correct order of the steps of a PCR?

Answer 6

Denature, anneal, extend

Question 7

Ti plasmid is used in research to genetically modify:

Answer 7

plants

Question 8

in which of the following is bacteria obtaining naked (free floating) DNA from the environment?

Answer 8

transformation

Question 9

Restriction enzymes (nucleases):

Answer 9

cut DNA

Question 10

Bacterophages:

Answer 10

are viruses that infect bacteria

Question 11

homeostasis or homeotic mutations in animals occur in which of the following genes ?

Answer 11

HOX genes

Question 12

which of the following is true?

Endotoxins are usually more lethal than exotoxins
Exotoxins are usually more lethal than endotoxins
Exotoxins and endotoxins usually have the same level of lethality

Answer 12

Exotoxins are usually more lethal than endotoxins

Question 13

A population of 1000 individuals
how would you calculate the observed dominant allele frequency in this population?

Answer 13

(700/1000)+(1/2)(200/1000)

Question 14

which of the following infections includes endospores?

Answer 14

botulism

Question 15

which of the following is an example of biofilms?

Answer 15

plaque

Question 16

Antibiotics should be selectively toxic, which means:

Answer 16

Antibiotics should kill the pathogen without harming the host

Question 17

When just the sick person is separated from the rest of the population to avoid spreading disease, we call this:

Answer 17

isolation

Question 18

If a population is in Hardy Weinberg equilibrium, then the expected genotype frequencies are represented by which equation?

Answer 18

p^2+2pq+q^2-1

Question 19

If a fly lands on your food and brushes off microbes onto the food, which then infect you, we call this transmission:

Answer 19

Mechanical Vector transmission

Question 20

what is the main source behind evolution?

Answer 20

alleles

Question 21

fitness is:

Answer 21

the ability to produce surviving fertile offspring

Question 22

human hair and dog our are an example of:

Answer 22

homology

Question 23

typology means:

Answer 23

organisms are unchanging

Question 24

sympatric speciation occurs when:

Answer 24

populations are living in the same area

Question 25

a phylogeny is:

Answer 25

the evolutionary history of a group of organisms

Question 26

hair and lactation in the following tree are an example of:

Answer 26

synapomorphies

Question 27

tetanus is an example of:

Answer 27

noncommunicable disease

Question 28

food poisoning is an example of:

Answer 28

communicable disease

Question 29

If a bacteria is called Bacillus, then:

Answer 29

it is rod shaped

Question 30

Flagella are for:

Answer 30

movement