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WorksheetsBIO-102 Chp 8 Clickers
Total questions: 20
Worksheet time: 10mins
The organelles in plants and algae that carry out photosynthesis are called:
mitochondria
chlorophyll
chloroplasts
stomata
mesophyll
Which one of the following statements about electromagnetic radiation is incorrect?
Light in the visible portion of the electromagnetic spectrum powers photosynthesis
Visible light comprises a large percentage of the electromagnetic spectrum of the sun
Photons of visible light can be absorbed by molecules in living cells in a way that does not permanently harm the molecules
Electromagnetic radiation travels as waves caused by the oscillation of electric and magnetic fields
The distance between peaks in a wave pattern of electromagnetic radiation is called the wavelength.
True or False: The Calvin Cycle reactions are sometimes referred to as the "dark cycle" reactions because they cannot occur in the presence of wavelengths of visible light
true
false
The addition of an oxygen molecule to ribulose bisphosphate (RuBP) is most accurately referred to as:
oxidative phosphorylation
photorespiration.
photophosphorylation
aerobic respiration
phosphorespiration.
Organisms which synthesize organic molecules from inorganic sources are most accurately referred to as ________, while organisms which must consume organic molecules from their environments to survive are most accurately referred to as ________.
heterotrophs; photoautotrophs
plants; animals
photoautotrophs; chemoautotrophs
autotrophs; heterotrophs
auxotrophs; autotrophs
Calvin cycle reactions occur in the ________, while light reactions occur in the ________.
stroma; thylakoid membranes
thylakoid lumen; thylakoid membranes
stroma; thylakoid lumen
thylakoid membranes; inner membrane
intermembrane space; stroma
True or False: The term pigment is used to describe molecules that, when light strikes them, change the path of the light in a different direction.
true
false
When an electron absorbs energy and exists in an excited state, the electron can:
drop back down to its original energy level and release light.
be removed from one molecule and transferred to a different molecule
drop back down to its original energy level and release heat
all three of these
The primary electron acceptor in Photosystem II is:
QA.
D1.
CP43.
pheophytin
P680
Which one of the following is the primary function of photosystem I in photosynthesis?
production of oxygen
production of glucose
synthesis of NADH
synthesis of ATP
synthesis of NADPH
Which one of the following statements most accurately explains the "enhancement effect" seen in photosynthesis?
The production of protons in photosystem II, combined with the consumption of protons in photosystem I, produce an electrochemical gradient used to synthesize ATP
The absorption of 1380-nm light results in more than twice the rate of photosynthesis than absorbing light of 680-nm and 700-nm
680-nm light activates the pigment in the reaction center of photosystem II, while 700-nm light activates the pigment in the reaction center of photosystem I.
680-nm light activates the pigment in the reaction center of photosystem I, while 700-nm light activates the pigment in the reaction center of photosystem II
True or False: The absorption of light during photosystem I results in an electron with a higher energy level than was attained during photosystem II.
true
false
Cyclic photophosphorylation is necessary in some photosynthetic organisms because:
NADPH, but not ATP, is produced via photosystem I.
the Calvin cycle requires equal amounts of NADPH and ATP, but more NADPH than ATP is produced in photosystem I.
ATP is consumed to transfer electrons from photosystem II to photosystem I and must be replenished prior to the Calvin cycle.
None of the above statements accurately describe the need for cyclic photophosphorylation
Which one of the following statements about chloroplast cytochrome b6 and mitochondrial cytochrome b is incorrect?
Both transport H+ across a biological membrane
They are products of homologous genes
Both accept electrons from a quinone
Both donate electrons to another protein within their respective complexes
All of the above statements about choloroplast cytochrome b6 and mitochondrial cytochrome b are correct
Arrange the phases of the Calvin Cycle in order from first to last.
i. carbon fixation
ii. regeneration of RuBP
iii. carbohydrate production
i, ii, iii
ii, iii, I
i, iii, ii
iii, ii, I
The most common storage form of carbohydrate in chloroplasts is:
glucose.
sucrose
cellulose
starch
glyceraldehyde-3-phosphate
Which one of the following statements about Rubisco is incorrect? Rubisco:
is perhaps the most abundant protein on Earth
catalyzes the formation of a six-carbon compound from ribulose bisphosphate and carbon dioxide
has carboxylase activity
is believed to have evolved fairly recently in the evolution of plants
All of the above statements about Rubisco are correct
True or False: C4 plants are particularly suited for conditions of high temperatures and intense sunlight.
true
false
The first product synthesized from photosynthesis in C4 plants is:
glucose.
3-phosphoglycerate (3PG)
oxaloacetate
RuBP
malate
Which one of the following statements about CAM plants is correct?
accumulate malate in the vacuoles of their cells, which is eventually used to drive Calvin cycle reactions
are a type of C3 plant
open their stomata during the day and close them at night
separate the functions of carbon fixation and the Calvin cycle into different types of cells
None of the above statements about CAM plants are correct
