Photosynthesis and ATP

During photosynthesis, the light-dependent phase only takes place in the presence of light and the dark phase, also known as the light-independent phase, only takes place in the absence of light.

• True

• False

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

ATP is broken down into adenosine diphosphate (ADP), and a phosphate molecule along with energy that is released when the energy-rich bond is broken; this process is called

• phosphorylation

• dephosphorylation

Which of the following is not an example of a way in which ATP is used? 

• • ATP provides energy for the beating of cilia and flagella, which are the hair-like organelles found in some microorganisms that help with movement or mobility.

• • ATP is used for the breaking down of macromolecules such as nucleic acids, proteins and fats. 

• • ATP is used for active transport or movement of substances across cell membranes. 

• • ATP is used in animals for the contraction of muscle cells.

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NGSS.HS-LS1-7

With low levels of light, a plant cannot photosynthesise, even if there is plenty of water and carbon dioxide available.

• • True

• • False

Tags

NGSS.HS-LS1-5

A ________ in carbon dioxide concentration leads to a decrease in the rate of photosynthesis, whereas a _______ in carbon dioxide concentration leads to an increase in the rate of photosynthesis.

• • decrease; increase

• • increase; decrease

Tags

NGSS.HS-LS2-5

Temperature can affect the rate of photosynthesis. How do high temperatures affect plants and what effect does this have on the rate of photosynthesis?

• • High temperatures cause the stomata of plants to close in order to limit the loss of water, resulting in inhibition of the rate of photosynthesis.

• • High temperatures cause the stomata to open, resulting in an increase in the rate of photosynthesis.

• High temperatures cause enzymes to become inactive, increasing the rate of photosynthesis

• • High temperatures cause plants to lose water rapidly, increasing the rate of photosynthesis.

Testing for the presence of starch (using bromine) can tell us whether photosynthesis occurred in a plant leaf or not. 

• • False

• • True

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which of the following statements is correct?

• • The starch test can tell us whether photosynthesis occurred in a plant leaf, but cannot tell us how efficient the photosynthesis was (the rate of photosynthesis).

• • The starch test cannot tell us whether photosynthesis occurred in a plant leaf and but can tell us how efficient the photosynthesis was (the rate of photosynthesis).

• • The starch test cannot tell us whether photosynthesis occurred in a plant leaf and also does not tell us how efficient the photosynthesis was (the rate of photosynthesis).

• • The starch test can tell us whether photosynthesis occurred in a plant leaf and can also tell us how efficient the photosynthesis was (the rate of photosynthesis).

Which of the following substances is a greenhouse made from?

• • Clear glass/plastic

• • Green wood

• • Green tinted glass

• • Green metal

Which of the following is a disadvantage of using greenhouses?

• • High maintenance

• • Protection from storms

• • All year long production

• • Pest control