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Bionline 10Abio

True/False
Indicate whether the statement is true or false.
 

 1. 

All organisms require energy to carry out life processes.
 

 2. 

Some of the energy in sunlight is captured and used to make inorganic compounds.
 

 3. 

Energy moves through food chains from heterotrophs to autotrophs.
 

 4. 

Autotrophs make their own organic molecules by using energy from inorganic materials or sunlight.
 

 5. 

Most plants are heterotrophic.
 

 6. 

ATP is a nucleotide with two carbohydrate groups.
 

 7. 

In ATP, three phosphate groups branch from a five-carbon sugar, ribose.
 

 8. 

The most common method of carbon dioxide fixation is the electron transport chain.
 

 9. 

Glycolysis is carried out in the cytoplasm of cells.
 

 10. 

Carbon dioxide production by yeast, which is used in the rising of bread and the carbonation of some beverages, takes place under aerobic conditions.
 

 11. 

Cellular respiration produces more ATP molecules than fermentation does.
 

 12. 

The total amount of ATP that a cell gains for each glucose molecule that enters glycolysis depends on the presence of carbon dioxide.
 

 13. 

After the replication of a cell’s chromatids, there are twice as many centromeres as there are chromosomes.
 

 14. 

After cell division, each new cell will contain the same genetic information as the original cell.
 

 15. 

A somatic or body cell contains a haploid number of chromosomes.
 

 16. 

Down syndrome occurs as a result of nondisjunction of chromosome 21 during cell division.
 

 17. 

It is possible that a fragment of DNA may become detached from a chromosome and then reattach in the reverse orientation, resulting in a mutation called inversion.
 

 18. 

Trisomy is the addition or removal of a single nitrogen-containing base.
 

 19. 

Nondisjunction results from the failure of replicated chromosomes to separate during cell division.
 

 20. 

After mitosis and cytokinesis, each new cell has a complete set of the parent cells’ chromosomes.
 

 21. 

Cancer is a disease characterized by uncontrolled cell division.
 

 22. 

During telophase, a nuclear envelope usually surrounds each new set of chromosomes.
 

 23. 

In plant cells, cytokinesis results in the formation of a cell plate in the center of a dividing cell.
 

 24. 

Animal cells form cell walls on either side of the cell plate during cytokinesis.
 

 25. 

During cytokinesis in plant cells, the cell is pinched in half by a belt of protein threads.
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 26. 

ATP is called a cell’s “energy currency” because
a.
ATP catalyzes all metabolic reactions.
b.
ATP allows one organelle to be exchanged for another between cells.
c.
glucose is made of ATP.
d.
most of the energy that drives metabolism is supplied by ATP.
 

 27. 

When a phosphate group is removed from an ATP molecule,
a.
a substantial amount of energy is released.
b.
an enzyme is formed.
c.
energy is stored.
d.
activation energy is increased.
 

 28. 

Light energy is converted to chemical energy through the process of
a.
cellular respiration.
c.
photosynthesis.
b.
fermentation.
d.
glycolysis.
 

 29. 

The major atmospheric by-product of photosynthesis is
a.
nitrogen.
c.
water.
b.
carbon dioxide.
d.
oxygen.
 

 30. 

When electrons of a chlorophyll molecule are raised to a higher energy level,
a.
they become a photon of light.
b.
they form a glucose bond.
c.
they enter an electron transport chain.
d.
carotenoids are converted to chlorophyll.
 

 31. 

photosynthesis : oxygen ::
a.
oxygen : carbon dioxide
c.
cellular respiration : oxygen
b.
cellular respiration : carbon dioxide
d.
cellular respiration : enzymes
 

 32. 

The energy used in the Calvin cycle for the production of carbohydrate molecules comes from
a.
ATP only.
c.
ATP and NADH.
b.
the Krebs cycle.
d.
carbon dioxide.
 

 33. 

During the third stage of photosynthesis, sugars are produced from
a.
ADP.
b.
glucose.
c.
carbon atoms from carbon dioxide in the air and hydrogen atoms from glucose.
d.
carbon atoms from carbon dioxide in the air and hydrogen atoms from NADPH.
 

 34. 

As light intensity increases, the rate of photosynthesis
a.
increases indefinitely.
b.
decreases indefinitely.
c.
increases until the light saturation point is reached.
d.
decreases until the light saturation point is reached.
 

 35. 

Low temperatures may cause photosynthesis to occur
a.
more quickly.
c.
at a constant rate.
b.
more slowly.
d.
None of the above
 
 
nar001-1.jpg
 

 36. 

Refer to the illustration above. Taken together, these graphs demonstrate that
a.
photosynthesis is independent of environmental influences.
b.
increases in light intensity cause increases in temperature.
c.
as the rate of photosynthesis increases, the temperature of a plant eventually decreases.
d.
the rate of photosynthesis is affected by changes in the environment.
 

 37. 

Which of the following is not part of cellular respiration?
a.
electron transport
c.
Krebs cycle
b.
glycolysis
d.
Calvin cycle
 

 38. 

Acetyl-CoA
a.
is formed from the breakdown of pyruvate.
b.
enters the Krebs cycle.
c.
combines with a four-carbon compound.
d.
All of the above
 

 39. 

After proton pumps in mitochondria have depleted electrons of their energy during ATP production,
a.
the electrons are used in the formation of water.
b.
the electrons carried are used in the formation of ethyl alcohol.
c.
the electrons build up inside the mitochondria and diffuse back to a thylakoid.
d.
None of the above
 
 
The questions below refer to the following balanced chemical equation.
C6H12O6 + 6O2 + ADP + P ® 6CO2 + 6 H2O + MOLECULE A
 

 40. 

Refer to the equation above. The process summarized by the equation begins in the cytoplasm of a cell and ends in the
a.
cytoplasm.
c.
endoplasmic reticulum.
b.
mitochondria.
d.
cell membrane.
 

 41. 

Which of the following is not formed during the Krebs cycle?
a.
CO2
c.
NADH
b.
FADH2
d.
NADPH
 

 42. 

Fermentation enables glycolysis to continue under
a.
anaerobic conditions.
c.
photosynthetic conditions.
b.
aerobic conditions.
d.
None of the above
 

 43. 

Binary fission
a.
occurs when two cells collide with each other.
b.
produces excess energy.
c.
creates new species.
d.
is the process by which bacteria reproduce.
 

 44. 

When a molecule of DNA is being used to direct a cell’s activities,
a.
areas containing specific active genes are extended.
b.
the areas of the molecule containing active genes become shorter.
c.
the entire DNA molecule becomes tightly coiled.
d.
the molecule becomes a rod-shaped structure with two chromatids.
 

 45. 

female : XX ::
a.
female : gametes
c.
male : YY
b.
female : eggs
d.
male : XY
 

 46. 

How many chromosomes are in the body cells of an organism that has a haploid number of 8?
a.
4
c.
12
b.
8
d.
16
 

 47. 

A student can study a karyotype to learn about the
a.
cell cycle.
b.
genes that are present in a particular strand of DNA.
c.
medical history of an individual.
d.
number and structure of the chromosomes in a somatic cell.
 

 48. 

The synthesis (S) phase is characterized by
a.
DNA replication.
b.
cell division.
c.
replication of mitochondria and other organelles.
d.
the division of cytoplasm.
 

 49. 

cell growth : G1 ::
a.
mitosis : C
c.
mitochondria replication : S
b.
mitosis : meiosis
d.
DNA copying : S
 

 50. 

metaphase : prophase ::
a.
G1 : M
c.
M : C
b.
G2 : S
d.
autotroph : producer
 



 
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