Chap 4, 10

Question 1

Algae->insect->fish->human->bear. How much of the chemcial energy fixed by photosynthesis of the algae (100%) is available to the bear?

Answer 1

0.01%

Question 2

Nitrogen is a growth limiting nutrient for many organisms because

Answer 2

it is necessary for the synthesis of amino acids

Question 3

Which of the following is used to portect organisms from the toxic by-products of oxygen?
A. catalase
B. beta-lactamase
C. superoxide dismutase

Answer 3

A and C only.

Question 4

Another term for the log phase of bacterial growth is

Answer 4

exponential growth

Question 5

Which of the following could NOT live in an atmospher of 5% oxygen?

Answer 5

obligate anaerobes

Question 6

Organsims that use organic molesules as their source of carbon are called

Answer 6

heterotrophs

Question 7

Organisms that use CO2 as their source of carbon are called

Answer 7

autotrophs

Question 8

A hyperthermophile has an optimum temperature between 40 and 80 degrees C.

Answer 8

False

Question 9

Another term for the log phase of bacterial growth is

Answer 9

exponential growth

Question 10

The lag phase of bacterial growth occurs when cells have plenty of food, very little wastes have built up, and are actively dividing

Answer 10

False

Question 11

A hot tub (with a water temperature of 103F or 39 C) would most likely contain

Answer 11

mesophiles

Question 12

The term “barophile” refers to which of the following growth requirements?

Answer 12

hydrostatic pressure

Question 13

Which of the following pairs is mismatched?

Answer 13

Thermophile optimum growth between 10-20 C

Question 14

Organisms that use CO2 as their source of carbon are called

Answer 14

autotrophs

Question 15

The process in which an organism converts N2 to ammonia is known as _____ and is only performed by some organisms in Domain _______

Answer 15

nitrogen fixation; Bacteria

Question 16

A microaerophile does not use oxygen for metabolism, but can live in an environment containing small concentrations of oxygen

Answer 16

False

Question 17

There are five stages of growth in an open system of culture

Answer 17

False

Question 18

Which organism is killed by atmospheric O2?

Answer 18

Obligate anaerobe

Question 19

Which of the following could NOT live in an atmosphere of 5% oxygen?

Answer 19

obligate anaerobes

Question 20

At temperatures higher than the maximum growth temperature for an organism,

Answer 20

All choices are correct

Question 21

Chemoheterotrophs

Answer 21

use preformed organic molecules as a carbon source AND as an energy source

Question 22

The term facultative anaerobe refers to an organism that

Answer 22

uses oxygen for metabolism and can grow without oxygen

Question 23

Organisms may derive energy from

Answer 23

sunlight AND metabolizing chemical compounds

Question 24

Phage typing is a technique in which a virus is used to identify an unkown bacterium (t or f)

Answer 24

True

Question 25

A cladogram is a series of yes-no questions that are used as a flow chart to identify an organism (T or F)

Answer 25

False

Question 26

Using antibodies to identify an unkown bacterim is known as___

Answer 26

serological test

Question 27

Woese

Answer 27

Was involved in determing rRNA sequences AND realized there are three distinct types

Question 28

The scientific name of an organism indicates its domain (T or F)

Answer 28

False

Question 29

Phage typing

Answer 29

is used to distinguish bacterial strains

Question 30

Which of the following types of microbes could cause disease in humans?

Answer 30

a neutrophile

Question 31

The lag phase of the bacterial growth curve is marked by

Answer 31

metabolically active cells, changing physiology

Question 32

Which could NOT live in an atomsphere of 5% oxygen?

Answer 32

obligate anaerobes

Question 33

Nitrogen is a growth limiting nutrient for many organisms because

Answer 33

it is necessary for the synthesis of amino acids

Question 34

Which of the following types of microbes could cause refrigerated foods to spoil?

Answer 34

psychrophiles

Question 35

A photoheterotroph gets its energy from light and carbon from CO2 (T or F)

Answer 35

False

Question 36

An obligate halophile will burst if placed in freshwater (T or F)

Answer 36

True

Question 37

A hot tub would most likely contain

Answer 37

mesophiles

Question 38

Which of the following pairs is mismatched?

Answer 38

thermophile-optimum growth between 10-20C

Question 39

Organisms that use organic molecules as their source of carbon are called

Answer 39

heterotrophs

Question 40

Which of the following types of microbes could NOT cause disease in humans?

Answer 40

a halophile and a barophile only.

Question 41

Halophiles grow equally well in the presence or absence of high salt concentrations (T or F)

Answer 41

False