Question 1

All of the following pertain to glycolysis except

Select one:

a. Occurs without
oxygen

b. Ends with
formation of pyruvic acid

c. Occurs during
fermentation

d. Degrades glucose
to CO2 and H2O

e. Involves reduction
of NAD

Question 2

A screening system called the _____ test is used for
detecting chemicals with carcinogenic potential.

Select one:

a. Koch

b. Ames

c. Mutation

d. Cancer

e. Iowa

Question 3

The operon segment composed of the gene that code for a
protein repressor is called the

Select one:

a. Operator

b. Structural locus

c. Regulator

d. Promoter

e. None of the
choices are correct

Question 4

Halo bacteria regulate osmotic pressure by

Select one:

a. Releasing salt to
the environment

b. Absorbing salt
from the environment

c. Excluding salt
from the environment

d. Changing their
cell wall to provide additional osmotic protection

e. None of the
choices are correct

Question 5

Facilitated diffusion is limited by

Select one:

a. Substrate
concentration

b. Carrier proteins
in the membrane

c. Size of the pores
in the membrane

d. Osmotic pressure

e. The size of the
cell

Question 6

Enzymes that catalyze removal of carbon dioxide from a
substrate are called

Select one:

a.
Phosphotransferases

b. Oxidoreductases

c.
Decarboxylases

d. Aminotransferases

e. Ligases

Question 7

In bacterial cells, when glucose is completely oxidized by
all the pathways of aerobic cellular respiration, what is the maximum number of
ATP generated?

Select one:

a. 2 ATP

b. 3 ATP

c. 24 ATP

d. 36 ATP

e. 38 ATP

Question 8

The following pertain to ribosomes during protein synthesis
except

Select one:

a. Contain codons
within their rRNA molecules

b. Participate only
in translation

c. Bind to the 5′ end
of mRNA by their small subunit

d. Use their large
subunit to supply enzymes for peptide bonding

e. Shift to the right
along the mRNA strand from one codon to the next

Question 9

The methanogens, producers of methane gas, require
environments that

Select one:

a. Have sunlight

b. Are very acidic

c. Have abundant
oxygen and CO2

d. Are extremely cold

e. Are anaerobic with
hydrogen gas and CO2

Question 10

All of the following could find a location in or on body
tissues suitable for growth except

Select one:

a. Psychrophiles

b. Anaerobes

c. Facultative
anaerobes

d. Mesophiles

e. Capnophiles

Question 11

The most serious type of mutation is a

Select one:

a. Point mutation

b. Silent mutation

c. Frame shift
mutation

d. Back mutation

e. All the choices
are equally serious

Question 12

Which of the following is not involved in the step that
occurs between glycolysis and the Krebs cycle?

Select one:

a. Reduction of NAD

b. Decarboxylation of
pyruvic acid

c. Coenzyme A
attaches to an acetyl group

d. Dehydrogenation of
pyruvic acid

e. Pyruvic acid
accepts electrons from NADH

Question 13

All of the following pertain to nitrogenous bases except

Select one:

a. Form pairs by
hydrogen bonding

b. Guanine pairs with
uracil

c. Adenine pairs with
thymine

d. Cytosine and
thymine are pyrimidines

e. Allows variation
from one nucleotide to another which creates the encoded information

Question 14

Which of the following additions have been made to
principles of the central dogma of biology?

Select one:

a. DNA information
cannot be converted into RNA information

b. Protein
information can be converted into DNA information

c. RNA can be used to
regulate gene function

d. All of these

Question 15

The reactions of fermentation function to produce _____
molecules for use in glycolysis.

Select one:

a. Pyruvic acid

b. ATP

c. NAD

d. NADH

e. Glucose

Question 16

The term heterotroph refers to an organism that

Select one:

a. Uses CO2 for its
carbon source

b. Must depend on
outside organic sources for their carbon needs

c. Gets energy from
sunlight

d. Gets energy by
oxidizing chemical compounds

e. Does not need a
carbon source

Question 17

In addition to electrons, which of the following is also
involved in electron transfer?

Select one:

a. ADP

b. Glucose

c. Carbon

d. Hydrogen

e. Carbon dioxide

Question 18

A permanent, inheritable change in the genetic information
is called a/an

Select one:

a. Translation

b. Transcription

c. Mutation

d. Alteration

e. Regeneration

Question 19

Enzymes that can function at boiling water temperatures or
other harsh conditions would be termed

Select one:

a. Denatured

b. Ribozymes

c. Abzymes

d. Exoenzymes

e. Extremozymes

Question 20

The term phototroph refers to an organism that

Select one:

a. Uses CO2 for its
carbon source

b. Must obtain
organic compounds for its carbon needs

c. Gets energy from
sunlight

d. Gets energy by
oxidizing chemical compounds

e. Does not need a
carbon source