Science Test #4
Photosynthesis Knowledge Quiz
Test your understanding of the photosynthesis process with our detailed quiz! This quiz covers essential aspects of light-dependent and light-independent reactions, the role of chloroplasts, and energy carriers like NADP+.
Challenge yourself with 17 multiple-choice questions designed for students and anyone interested in plant biology and photosynthesis.
In photosynthesis, what are the roles of NADPH & ATP in the light-independent reactions?
Providing the oxygen for sugar molecules
Providing the carbon for sugar molecules
Absorbing the energy or light and transferring it to electrons
Supplying the energy necessary to assemble sugar molecules.
What is the role of light in photosynthesis?
light energy is cycled within the thylakoid
Light is reflected from the chloroplast during the light-independent reactions
the chloroplast reflects the green wavelengths of light
Light is the ultimate energy source for converting NADP+ to NADPH and indirectly ADP to ATP
What BEST describes the toles of phtosystem 1 and photosystem 2 in the process of photosynthesis?
They absorb sunlight and distribute the energy as heat
They absorb sunlight and transfer the energy to electrons
They form ATP as hydrogen ions cross the thylakoid membrane
They transfer electrons from a series of intermediates to form NADPH
Which of the following is the role of the ETC in the process of photosynthesis
Adding energy to the electrons that enter photosystem 1
Carrying electrons from photosystem 2 to photosystem 1 pulling in H+ ions
Removing electrons from the chloroplast
Cycling electrons from photosystem 1 to photosystem 2.
Daniel is developing a model of the light-independent reactions of photosynthesis, also known as the Calvin cycle. How should the model show how carbon compounds enter and exit the cycle?
Enter as glucose then exit as 3-carbon molecules
Enter as carbon dioxide then exit as two 3 carbon molecules that will combine
Enter as elemental carbon, exit cycle as a completed 6 carbon molecule
Enter as glucose, exit as carbon dioxide
During the light-dependent reactions of photosynthesis, which event must occur for ATP synthase to function properly?
Molecular oxygen must combine with ATP synthase
Photosystem 1 and photosystem 2 must be deactivated
Hydrogen ions must pass through a channel within ATP synthase
A molecule of ATP must release a phosphate group to become ADP
Mimi is asked to describe the structures of chloroplasts. She writes the following sentence: "A chloroplast contains thylakoid stacks, called stroma, that are surrounded by fluid-filled grana." Which change to the sentence is necessary to make the sentence accurate?
Switch the term 'stroma' and 'grana'
Replace 'grana' with 'chlorophyll'
Switch the terms 'thylakoid' and 'stroma'
Replace 'stroma' with 'chlorophyll'
William is listing the changes to matter and energy that occur during the process of photosynthesis. Which of these examples should he include in his list?
Changes that convert chemical energy into heat and light
Nuclear changes that convert hydrogen and oxygen into carbon
Chemical changes that convert carbohydrates into smaller molecules
Changes that convert light energy into chemical energy stored in carbohydrates like sugar
What describes the process of conversion of ADP to ATP?
A release of energy as a third phosphate group is attached
An input of energy as a third phosphate group is attached
A release of energy as one phosphate group detaches
an input of energy as both phosphate groups separate from ribose
Avier is describing the role of energy carries,. Such as NADP+, in photosynthesis. Which property of NADP+should Xavier cite?
Its reactivity with oxygen and water and carbon dioxide
Its ability to emit a stream of electrons in a nuclear reaction
Its ability to accept and release two high energy electrons
The chemical bonds formed by electrons in its molecular structure to carry phosphates
Taylor is explaining why chlorophyll is classified as a plant pigment and how it is useful in photosynthesis. Which property of chlorophyll would be most appropriate for her to cite?
Chlorophyll's absorption of green color
Chlorophyll's presence in stroma
Chlorophyll's ability to absorb red and blue light
Chlorophyll's reactivity with oxygen.
Under normal condition, gases diffuse through stomata, small holes in the bottom leaves of a plant. When the weather is dangerously hot and dry, plants may become stressed and close these openings to conserve water. How are the closures most likely to affect photosynthesis?
They increase the rate of photosynthesis by increasing the amount of water in the leaf
They have little or no effect on photosynthesis because gases do not take part in the process
They decrease the rate of photosynthesis by preventing carbon dioxide from entering the leaf
They increase the rate of photosynthesis by increasing the amount of oxygen in the leaf
By analyzing the equation: 6CO2 + CH20 = C6H12O6 +6O2, which property of photosynthesis can be identified?
The source of carbon atoms in the carbohydrate product (sugar)
The chemical changes that occur only during the light-dependent reactions
The chemical changes that occur only during the light-independent reactions
The formulas and roles of electron carriers
During photosynthesis what best describes the role of the compund with the chemical formula C6H12O6?
A product that is useful because of its high energy chemical bonds
A reactant that is useful because of its high-energy chemical bonds
A product that is not useful because of its low-energy chemical bonds
Either a product or a reactant , depending on whether the cell needs to store energy or release energy
What is the name of the enzyme responsible for carbon fixation in photosynthesis
Rubisco
Carbohydrase
RuBP
ADP synthase
ATP synthase
Ohn drew a diagram of the light-dependent reaction for his table team. In his drawing an arrows leads from the splitting of water, to the two photosystems, and then to NADP+. What process is represented by this arrow?
The formation of high-energy sugars
The conversion of electrons into sunlight
The cycling of light energy within the photosystems
The movement of electrons along the ETC.
What is the important 3-carbon molecule produced int eh Calvin Cycle when electrons are added to a 3-carbon bi-phosphate molecule?
ATP
RuBP
4DP
Rubisco
G3P
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