Download Enzyme photosynthesis questions

Name _______________________ Period__________ Practice
Choose the one answer that best answers the question by circling your response.
1
Enzymes accelerate reactions by ___ the activation energy needed for the reaction.
A) Stopping
B) Raising
C) Lowering
D) Binding
2
The values for environmental factors at which an enzyme functions best is called the.
A) paradigm of maximum effectiveness
B) optimal conditions
C) comfortable conditions
D) efficient conditions
5
What happens to an enzyme when it denatures?
A) The activation energy of the reaction is doubled.
B) The activation energy of the reaction is lowered.
C) The shape of the enzyme molecule is changed.
6
Most enzymes are composed of...
A) Lipids
B) carbohydrates
C) Proteins
D) phosphates
7-Hydrogen peroxide (H2O2) is a toxic by-product of cellular metabolism in aerobic
organisms. The reaction below occurs within the cells to prevent the accumulation of
hydrogen peroxide. In this reaction, catalase functions as an
a)
b)
c)
d)
enzyme in the breakdown of hydrogen peroxide
enzyme in the synthesis of hydrogen peroxide
emulsifier in the digestion of hydrogen peroxide
indicator in the detection of hydrogen peroxide
8-What does the process of photosynthesis produce?
a. starch, which is metabolized into less complex molecules by dehydration
synthesis
b. protein, which is metabolized into less complex molecules by dehydration
synthesis
c. glycerol, which is metabolized into more complex carbohydrates by
dehydration synthesis
d. glucose, which is metabolized into more complex carbohydrates by
dehydration synthesis
9-Which process provides most of the oxygen found in Earth's atmosphere?
a.
b.
c.
d.
photosynthesis
aerobic respiration
dehydration synthesis
fermentation
10-In humans, which substance is produced anaerobically during strenuous activity?
a.
b.
c.
d.
lactic acid
glycogen
carbon dioxide
alcohol
11-A compound that is synthesized by both humans and geranium plants is
a.
b.
c.
d.
cellulose
ATP
ethyl alcohol
chlorophyll
12-In the oxidation of glucose to water and carbon dioxide, enzymes are needed to
catalyze the
a.
b.
c.
d.
combination of glucose molecules
release of energy by hydrogen removal
storage of energy in glycogen molecules
production of lactic acid
13-In living plants, when does respiration occur?
a.
b.
c.
d.
only during digestion
only in the daytime
only in total darkness
all the time
14-In the process of photosynthesis, chlorophyll serves as
a.
b.
c.
d.
an end-product
a raw material
an energy converter
a hydrogen acceptor
15-Which color light is least important to a green plant during photosynthetic
activities?
a.
b.
c.
d.
green
yellow
blue
orange
16-In living plants, when does respiration occur?
a.
b.
c.
d.
only in the daytime
only in total darkness
all the time
only during digestion
17-Through the use of oxygen-18 (heavy oxygen), scientists have found that the
oxygen released during photosynthesis comes from molecules of
a.
b.
c.
d.
carbon dioxide
water
glucose
chlorophyll
Biology Photosynthesis
1. The organic molecule produced directly by photosynthesis is: a) lipids; b)
sugar; c) amino acids; d) DNA
2. The photosynthetic process removes ___ from the environment. a) water; b)
sugar; c) oxygen; d) chlorophyll; e) carbon dioxide
3. Carbon dioxide enters the leaf through ____. a) chloroplasts; b) stomata: c)
cuticle; d) mesophyll cells; e) leaf veins
4. The cellular transport process by which carbon dioxide enters a leaf (and by
which water vapor and oxygen exit) is ___. a) osmosis; b) active transport; c.
co- transport; d) diffusion; e) bulk flow
5. The process by which most of the world's autotrophs make their food is
known as ____. a) glycolysis; b) photosynthesis; c) chemosynthesis; d)
herbivory; e) C-4 cycle
6. Generally speaking, the longer the wavelenght of light, the ___ the available
energy of that light. a) smaller; b) greater; c) same
7. The section of the electromagnetic spectrum used for photosynthesis is ___.
a) infrared; b) ultraviolet; c) x-ray; d) visible light; e) none of the above
8. The colors of light in the visible range (from longest wavelength to shortest)
is ___. a) ROYGBIV; b) VIBGYOR; c) GRBIYV; d) ROYROGERS; e)
EBGDF
9. The photosynthetic pigment that is essential for the process to occur is ___.
a) chlorophyll a; b) chlorophyll b; c) beta carotene; d) xanthocyanin; e)
fucoxanthin
10. When a pigment reflects red light, _____. a) all colors of light are
absorbed; b) all col;ors of light are reflected; c) green light is reflected, all
others are absorbed; d) red light is reflected, all others are absorbed; e) red
light is absorbed after it is reflected into the internal pigment molecules.
11. Chlorophyll a absorbs light energy in the ____color range. a) yellowgreen; b) red-organge; c) blue violet; d) a and b; e) b and c.
12. The individual flattened stacks of membrane material inside the
chloroplast are known as ___. a) grana; b) stroma; c) thylakoids; d) cristae; e)
matrix
13. Light of the green wavelengths is commonly absorbed by which accessory
pigment? a) chlorophyll a; b) chlorophyll b; c) phycocyanin; d) beta carotene
14. The carbon incorporated into the carbohydrate comes from ___. a) ATP; b)
NADPH; c) carbon dioxide; d) glucose; e) organic molecules