 Which of the following is the best example of K-
strategist species?
 A- Fruit Flies
 B- Fish
 C- Humans
 D-Beetles
 E- Desert Annual Flowers
C-Humans
 The role of oxygen in aerobic respiration is
 A- The final hydrogen acceptor in the electron transport




chain
B- in glycolysis
C- in the Kreb Cycle
D-Exactly the same as a cytochrome
E- To reduce NAD to NAD+
A- the final hydrogen
acceptor in the electron
transport chain
 Cows belong to which trophic level?
 A- primary consumers
 B- producer
 C- decomposer
 D- carnivore
 E- autotrophs
A- Primary Consumers
 The frequency of crossing-over event occurring
between any two linked genes is
 A-Proportional to the distance between them
 B- greater if the genes are sex-linked
 C- higher if they are dominant and lower if they are
recessive
 D- higher if the genes are in a male
 E- higher if the genes are on separate
A- proportional to the
distance between them
 What kind of chemical bonds are found between the
nitrogenous bases in a molecule of DNA?
 A- Covalent
 B- van der Waals
 C- ionic
 D- hydrogen
 E- disulfide
D- hydrogen
 Who was the author and naturalist who developed a
theory of natural selection independently of Darwin
and who is often credited along with Darwin for the
theory we accept today?
 A- Linnaeus
 B- Cuvier
 C- Lyell
 D- Wallace
 E- Lamarck
D- Wallace
 Genetic Drift has the largest effect on allele
frequencies when
 A- mating is random
 B- the population is small
 C- there is no migration, in or out
 D- there is no natural selection
 E- there is no mutation
B- The population is
small
 Which extraembryonic membrane in birds is
analogous to the placenta in mammals?
 A- Chorion
 B- Amnion
 C- Eggshell
 D- Allantois
 E- Yolk Sac
D- Allantois
 Polymerase chain reaction would be carried out to
accomplish which one of the following?
 A- To prevent a virus from replicating
 B- To amplify a region of DNA
 C- to identify the location of a point mutation in a
genome
 D- to identify a chromosome mutation
 E- to prepare a specimen of DNA for X-ray diffraction
B- to amplify a
region of DNA
 All of the following structures are adaptations
specifically for life on land EXCEPT
 A- Xylem
 B- roots
 C- waxy cuticle
 D- seeds
 E- cell walls
E- Cell Walls
 All of the following are correct about enzyme-
catalyzed reactions EXCEPT
 A- phosphofructokinase is inhibited by ATP
 B- Enzymes speed up reactions by supplying necssary
energy
 C- enzymes lower the energy of activation
 D- enzymes often require the presence of minerals
 E- all enzymes are not active at the same pH
B- enzyme speed up
reactions by supplying
necessary energy
 Pinching back a plant, removing the new leaves at the
top, results in the plant growing bushier. This happens
because when the new leaves are removed,
____________ is removed as well.
 A- Gibberellins
 B- cytokinins
 C- auxins
 D- ethylene
 E- abscisic acid
C- Auxins
 All of the following are true about cellular respiration
EXCEPT
 A- NAD+ is reduced to NADH during both glycolysis




and the Kreb Cycle
B- in the absence of NAD+, glycolysis cannot occur
C- ATP is produced by substrate level phosphorylation
during electron transport chain
D- the most important product of glycolysis is ATP
E- lactic acid is converted back to pyruvic acid in the
liver
D- the most important
product of glycolysis is
ATP
Which is correct about the
person from whom this
karotype was taken?
A- Person has Klinefelter’s
syndrome
B-Person has sex-linked
conditions
C- Person has Down’s
Syndrome
D- Person has hemophilia
E- The person has Turner’s
syndrome
C- The person has
Down’s syndrome
 Oxygen is released…
 A- Light Dependent reaction (light reaction)
 B- Light independent reaction (Dark reaction)
 C- both light and dark reaction
 D- neither light or dark reaction
A- Light Dependent
reaction (light
reaction)
 Photolysis occurs
 A – Light dependent reaction (light reaction)
 B- Light Independent reaction (dark reaction)
 C- Both light dependent and light independent reaction
 D- Neither light and light independent reaction
A- Light Dependent
reaction (Light
Reaction)
 The population of peppered moths in England
changed from white to black in less than 100 years.
This is an example of
 A- directional selection
 B- genetic drift
 C- disruptive selection
 D- sexual selection
 E- artificial selction
A- Directional
Selection
 The process by which some bacteria convert nitrate to
free nitrogen is called
 A- ammonification
 B- nitrogen fixation
 C- denitrifying
 D- nitrifying
 E- denitrogenation
C- Denitrifying
 Which of the following is the dominant stage of the
life cycle in moss?
 A- Diploid
 B- sporphyte
 C- flowering stage
 D- monoploid (haploid)
 E- none of the above is correct
D- Monoploid
 In order to move from the right side of the heart to the
left side of the heart, blood must pass through the
 A- mitral valve
 B- vena cava
 C- right atrioventricular valve
 D- lungs
 E- aorta
D- Lungs
 A diploid cell has three pairs of homologous
chromosomes : AaBbCcDd. How many different
gametes can this cell produce?
 A- 4
 B- 8
 C- 16
 D- 32
 E- 64
C- 16
 This type of problem can be solved by
following this 2 raised to the power of
the n umber of pair of alleles. There are
four pairs of alleles, so 24 = 16
 During the period when life is believed to have begun
the atmosphere on primitive Earth contained
abundant amounts of all the following EXCEPT
 A- oxygen
 B- hydrogen
 C- ammonia
 D- methane
 E- water
A- oxygen
 Which of the following represents the correct
sequence of events in embryonic development?
 A- Blastula –cleavage-morula- gastrula-neurula
 B- Blastula – neurula – cleavage- morula-gastrula
 C- Cleavage- morula-blastula-neurula-gastrula
 D- Cleavage- morula-blastula-gastrula-neurula
 E- Morula- blastula-gastrula-cleavage- neurula
 D- A fertilized egg undergoes a series of
changes in the following order cleavage
(first division of the zygote), morula
(solid ball), blastula (hollow ball),
gastrula (formation of three germ
layers ), and neurula (formation of
nervous system)
 Chemical substances released by organisms that elicit
a physiological or behavioral response in other
members of the same species are known as
 A- Auxins
 B- hormones
 C- phermones
 D- enzymes
 E- coenzyme
C- Pheromones
 Hawkmoths are insects that are similar in appearance
and behavior to hummingbirds. Which of the
following is LEAST valid?
 A-These organisms are examples of convergent




evolution
B- These organisms were subjected to similar
environmental conditions
C- These organisms are genetically related to each other
D- These organisms have analogous structure
E- These organisms can survive in similar habitats
C- These organisms are
genetically related to each
other
 If an invertebrate possesses malpighian tubules, a
tracheal breathing system, and an open circulatory
system it is most likely to be
 A- snail
 B- sponge
 C- butterfly
 D- earthworm
 E- flatworm
C- butterfly