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Semester Exam
Semester Exam
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Questions
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Answers
1
In this food web, which is a primary consumer?
both X and Y
Z
X
Y
2
Most of the ATP in cellular respiration is generated by __________.
fermentation
the Krebs cycle
glycolysis
the electron transport chain
3
What is the monomer of carbohydrates?
nucleotide
fatty acids
monosaccharide
amino acid
4
What is the optimum pH for enzyme A?
5
8
0
3
5
During a hard workout, your body is unable to get enough oxygen to your muscle cells. Which of the following occurs?
a large amount of ATP is formed
lactic acid is produced
cellular respiration ceases
electron carrier molecules are destroyed
6
Which of the following types of succession would most likely occur after a forest fire?
secondary succession
tertiary succession
primary producers
primary succession
7
Which of the following is NOT a characteristic of a pioneer species?
They disperse many seeds
They reproduce slowly
They grow quickly
They are usually small
8
Which of the following might be a density-dependent limiting factor for a group of perch in a lake?
water pH
soil quality
surrounding temperatures
amount of prey
9
Which of the following might be a density-independent limiting factor for a group of kangaroo rats?
disease
flash floods
amount of grass
predators
10
If a normal plant were put in a dark room, why would the Calvin cycle eventually stop?
The Calvin cycle cannot occur in the dark.
The plant would be unable to take in carbon dioxide.
The Calvin Cycle would never stop, unless you stop watering the plant.
Products of the light reactions are needed for the Calvin Cycle to occur.
11
What relatively recent development is greatly impacting the carbon cycle?
cellular respiration
formation of carbonate rocks
formation of fossil fuels
combustion (burning) of fossil fuels
12
Exponential growth is represented by a _________________.
Y-curve
J-curve
K-curve
S-curve
13
How do enzymes speed up chemical reactions?
Enzymes are proteins and are made of amino acid.
Enzymes raise the activation energy required.
They move very fast.
Enzymes lower the activation energy required.
14
Which of the following organisms have the greatest amount of stored energy in the food web?
hawk and coyote
roadrunner and rabbit
grass and cactus
grasshopper and scorpion
15
What is the NET total of ATP produced in cellular respiration?
2
50 or more
36-38
4
16
Which of the following is a biotic factors in an ecosystem?
sunlight
nutrients in soil and water
microorganisms
precipitation
17
In plants, what is the function of the stomata?
To take in light for photosynthesis
To protect the chloroplasts
To bring water to the plant cells
To take in CO2 and release O2
18
6____A____ + 6 H2O --->C6 H12O6 + 6___B____ A=?
carbon dioxide
ATP
oxygen
water
19
Why is fermentation important to cells?
None of these
Helps create glucose without O2 present
Helps create ATP without O2 present
it regenerates oxygen
20
Which is an abiotic factor that would affect the ability of a species of tree to survive in a particular habitat?
type and number of tree parasites present
availability of minerals in the soil
climax vegetation of the area
type and number of rabbits present
21
Glycolysis is a reaction in which
two molecules of pyruvate are products
2 net ATP are produced
all of these
a molecule of glucose is split
22
What is the monomer of proteins?
fatty acids
monosaccharide
amino acid
nucleotide
23
An organism that eats only plants.
producer
consumer
carnivore
herbivore
24
Which of the following statements is TRUE about the Calvin Cycle?
all of these
requires ATP and electron carriers
generates glucose
requires products of the light reactions
25
a creature that consumes other organisms for energy would be classified as what type of organism?
synetotroph
chemotroph
heterotroph
autotroph
26
Where do the ETC (electron transport chain) reactions take place?
B
A
C
none of these
27
How do yeast obtain energy?
Alcoholic Fermentation
Aerobic Respiration
Photosynthesis
Lactic Acid Fermentation
28
Why will the herbs and shrubs most likely replace the lichens and mosses?
Dense shrubs are the climax community for this environment.
The lichens will modify the environment to make it more suitable
An increase in co2 in soil will make it possible for taller plants to grow.
Increased cultivation by humans will provide more fertile soil.
29
According to the graph, which species is a pioneer species?
dwarf shrubs
spruce
birch
grasses
30
When carrying capacity is reached, which of the following is FALSE?
the populations in the ecosystem will decline or level off
the populations in the ecosystem will increase infinitely
the population decline significantly
resources are limited
31
An elk eats grass. A grizzly bear eats the elk. This is an example of a _____.
food web
succession
food pyramid
food chain
32
The process of cellular respiration
is performed only by organisms that can’t photosynthesize.
is performed only by animals.
occurs before plants are able to carry out photosynthesis.
occurs in all living organisms.
33
Which of the following will NOT increase the rate of photosynthesis?
Warmer temperatures
More light intensity
High levels of carbon dioxide
Very cold temperatures
34
What is the function of proteins?
short term energy storage
cellular structure
long term energy storage and protection
store and transmit genetic information
35
ATP releases energy when___________.
a phosphate group is removed from the molecule
a hydroxyl group is added to the phosphate group end
it undergoes a condensation or dehydration synthesis reaction
a phosphate group is added to the molecule
36
An organism that eats only meat
producer
carnivore
herbivore
consumer
37
What equation represents a population that is increasing?
Birth + Immigration > Death + Emigration
Birth + Immigration < Death + Emigration
Birth + Immigration = Death + Emigration
Birth + Death = Immigration + Emigration
38
What typically happens to a population if it exceeds its carrying capacity?
birth rate will exceed death rate
death rate will exceed birth rate
migration into the area increases
prey species increase
