chemosynthetic autotrophs obtain energy by oxidizing such inorganic substances a

Question

chemosynthetic autotrophs obtain energy by oxidizing such inorganic substances as?
a. PGA
b. PGAL
c. sulfur
d. h2o

c4 plants have an advantage in hot, dry conditions because ____.
a. their leaves are covered with thicker wax layers than those of c3 plants.
b. their stromates open wider than those of c3 plants, thus cooling surfaces.
c. co2 is fixed in the mesophyll cells, where the c3 pathway occurs, then delivered to the bundle sheath cells.
d. they are also capabale of capturing co2 by photorespiration.

when light excites chlorophyll, the chlorophyll molecule
a. changes to carotene
b. becomes agitqated and moves rapidly
c. becomes radioactive
d. absorbs energy and moves an e- to a higher energy state.
e. becomes ionized

which of the following statements about the electromagnetic spectrum is true?
a. infrared energy is sufficient to produce ionization.
b. infrared radiation has more energy than red radiation.
c. visible light has more energy than ultraviolet radiation.
d. chlorophyll absorbs some visible wavelengths, but not all.
e. chloroplasts absorb all wavelengths of light equally.

during which phase of aerobic respiration is atp produced directly by substrate-level phosphorylation?
a.. glucose formation
b. ethyl-alcohol formation
c. acetyl-CoA formation
d. glycolysis

atp production by chemiosmosis involves
a. h+ concentration and electirc gradients across a membrance
b. ATP synthases
c. formation of ATP in the inner mitochondrial compartment
d. all the above

during the fermentation pathways, a net yield of two atp is produced from _____; the nad+ necessary for the ______ is regenerated during the reactions.
a. the kreb's cycle; glycolysis
b. glycolysis; electron transport phosphorylation
c. the kreb's cycle; electron transport phosphorylation
d. glycolysis; glycolysis

Explanation / Answer

chemosynthetic autotrophs obtain energy by oxidizing such inorganic substances as?
c. sulfur

c4 plants have an advantage in hot, dry conditions because ____.
c. co2 is fixed in the mesophyll cells, where the c3 pathway occurs, then delivered to the bundle sheath cells.

when light excites chlorophyll, the chlorophyll molecule
d. absorbs energy and moves an e- to a higher energy state.

which of the following statements about the electromagnetic spectrum is true?
d. chlorophyll absorbs some visible wavelengths, but not all.


during which phase of aerobic respiration is atp produced directly by substrate-level phosphorylation?
d. glycolysis

atp production by chemiosmosis involves
d. all the above

during the fermentation pathways, a net yield of two atp is produced from _____; the nad+ necessary for the ______ is regenerated during the reactions.
b. glycolysis; electron transport phosphorylation

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