Cellular Energy

What type of organism converts light energy from the Sun into chemical energy?

• a heterotroph

• a detritivore

• a chemoautotroph

• a photoautotroph

Answer explanation

A heterotroph must consume something for energy, a detritivore decomposes organic matter for energy, a chemoautotroph does create its own energy but does so through chemosynthesis not light energy.

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

Why is there a net yield of two, not four, ATP molecules in glycolysis?

• 2 molecules of ATP are used to begin glycolysis

• 2 molecules of ATP are produced during glycolysis

• 2 molecules of ATP are produced from ATP synthase

• 2 molecules of ATP are used to complete glycolysis

Answer explanation

It takes energy from ATP to split glucose. During the process of glycolysis, a total of 4 ATP are produced. 4 ATP - 2ATP= 2 ATP

Tags

NGSS.HS-LS1-7

Where is the location of the light-dependent reactions?

• granum

• stroma

• thylakoid

• matrix

Answer explanation

The light-dependent reaction is the electron transport chain. The ETC happens along the thylakoid membrane.

Under ideal conditions, how many ATP molecules are created from cellular respiration in eukaryotic cells?

• 32

• 34

• 36

• 38

Answer explanation

Remember: 36 isn't always the number produced. it is a range usually between 32-38, but 36 is generally the accepted answer to simplify

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-3

Which of the following is the chemical equation for cellular respiration?

• 
• 

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NGSS.HS-LS1-7

The chemical equation for photosynthesis is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.

• True

• False

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NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which describes the process of cellular respiration?

• Anabolic pathway that breaks molecules into energy

• Anabolic pathway that builds molecules of stored energy

• catabolic pathway that breaks molecules into energy

• Catabolic pathway that builds molecules of stored energy

Answer explanation

Catabolic process break down molecules not builds molecules

Anabolic pathways build molecules not break them down.

Cellular respiration is catabolic because it breaks sugar down for energy. Photosynthesis is anabolic because it creates glucose to store energy

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NGSS.HS-LS1-7

NGSS.HS-LS2-3

Elena is taking a guided hike through a New Hampshire forest in October to enjoy the changing colors of autumn leaves. Her guide explains that the leaves change color as the green pigment chlorophyll used in photosynthesis decomposes. Another hiker asks the guide to explain photosynthesis. Which is the guide’s answer?

• Photosynthesis is a process heterotrophs use to make energy

• Photosynthesis is the process autotrophs use to make energy

• Photosynthesis is the process heterotrophs use to make sugars

• Photosynthesis is the process autotrophs use to make sugar

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why is glycolysis an anaerobic process?

• Glycolysis does not produce carbon dioxide in its steps

• Glycolysis produces carbon dioxide in its steps

• Glycolysis utilizes oxygen in its steps

• Glycolysis does not utilize oxygen in its steps

Answer explanation

Glycolysis happens without oxygen meaning it is anaerobic. Anaerobic is without oxygen and has nothing to do with the presence of carbon dioxide.

Which of the following is an autotroph

• daisy

• mushroom

• wolf

• earthworm

Answer explanation

Mushrooms are decomposers, wolfs are autotrophs, earthworms are detritivores

Tags

NGSS.MS-LS1-6