Homework 2

Question 1

T or F: fungi do not use spores for reproduction but rather as a means to survive dangerous environmental conditions

Answer 1

false

Question 2

this type of endocytosis is where a cell “drinks” small dissolved substances via vesicles

Answer 2

pinocytosis

Question 3

what is the primary site of lipid production in a eukaryotic cell

Answer 3

smooth ER

Question 4

T or F: microtubules are large hollow structures made of actin that form spindles during cell division

Answer 4

false

Question 5

the technical term for unicellular fungi

Answer 5

yeast

Question 6

T or F: lysosomes are vesicles that contain hydrolytic enzymes that can damage other cells and viruses

Answer 6

true

Question 7

the chloroplast and this organelle are derived from ancient bacteria via different endosymbiotic events

Answer 7

mitochondria

Question 8

cilia

Answer 8

small projections that can be synchronized in a rowing motion for motility

Question 9

chromatin

Answer 9

loosely packed DNA and associated proteins

Question 10

chloroplast

Answer 10

site of photosynthesis in plant cells

Question 11

flagella

Answer 11

large projection, encased in plasma membrane, that uses tubulin fibers for motility

Question 12

T or F: all cellular respiration uses oxygen as its terminal electron acceptor

Answer 12

false

Question 13

halophile

Answer 13

thrives in high salt environments

Question 14

alkaliphile

Answer 14

thrives in basic pH environments

Question 15

obligate aerobe

Answer 15

only grows when oxygen is present

Question 16

facultative anaerobe

Answer 16

grows best with oxygen but can grow anaerobically

Question 17

you allow a bacterial sample to two hours and observe four rounds of cell division. calculate the generation time, in minutes, for this bacteria

Answer 17

30

Question 18

lag phase

Answer 18

cells in a new environment begin to turn on metabolic pathways, but are not growing

Question 19

log phase

Answer 19

cells are doubling at the maximum rate allowed by the environment

Question 20

stationary phase

Answer 20

number of cells dying is equal to the number of cells dividing

Question 21

death phase

Answer 21

cells are dying at a faster rate than new cells are being produced

Question 22

T or F: most important human pathogens are mesophiles because this temperate range includes that of the human body

Answer 22

true

Question 23

this metabolic process uses pyruvic acid to sustain ATP production in the absence of a respiratory chain

Answer 23

fermentation

Question 24

T or F: anabolic pathways use energy to construct large macromolecules from smaller subunits

Answer 24

true