WorksheetsCell Energy Unit Review
Total questions: 15
Worksheet time: 8mins
Why is the electron transport chain an important step in aerobic respiration?
It releases oxygen as a waste product.
It breaks down glucose molecules.
It produces most of the ATP molecules.
It converts water and carbon dioxide into glucose.
Which statement best describes photosynthesis and respiration?
Autotrophs carry out photosynthesis, while autotrophs and heterotrophs carry out respiration.
Autotrophs and heterotrophs both carry out photosynthesis and then respiration.
In autotrophs, photosynthesis requires oxygen, and respiration requires carbon dioxide.
Only autotrophs carry out photosynthesis, while only heterotrophs carry out respiration.
A teacher explains that glucose molecules in plants interact with other elements and molecules to form nucleic acids. The teacher then asks a student to provide evidence to support this statement.
Which evidence should the student provide in support of the claim?
Glucose molecules help in the formation of a helical structure.
Glucose provides energy for the formation of nucleic acid structure.
Glucose gets converted to form elements like phosphorus and nitrogen.
Glucose molecules provide carbon, hydrogen, and oxygen for nucleic acid synthesis.
A student tests the hypothesis that an increase in carbon dioxide concentration decreases the rate of respiration in organisms. She conducts an experiment in which she completes multiple trials.
What should be the next step of the scientific investigation?
Form a hypothesis.
Gather and analyze data.
Repeat the experiments three times.
Draw conclusions from the results.
How are the reactions of photosynthesis and cellular respiration interconnected?
The reactions are opposites of one another, each using the products of the other as reactants.
Both reactions require ATP as the energy source, but photosynthesis only happens in plants.
Every organism carries out both processes at the same time but in different parts of the organism.
Animals rely on photosynthesis in plants, and plants rely on respiration as the source for their ATP.
Which situation will most likely cause increased production of lactic acid in cells?
eating a large meal
lifting a heavy object
running for several hours
sitting still for a long period of time
Which process produces oxygen?
chemosynthesis
osmosis
photosynthesis
respiration
What organelle transforms the energy in carbohydrates into molecules of ATP?
chloroplast
mitochondrion
nucleus
ribosome
Where are most of the ATP molecules produced in cells?
mitochondria
nuclei
ribosomes
vacuoles
Ribose sugar is used to make nucleic acids; however, it is not formed directly in photosynthesis but is formed from glucose. How does glucose form ribose?
by losing several elements
by adding new elements
by dividing in half to form two ribose molecules
by combining with another glucose molecule
6CO2 + 6H2O → C6H12O6 + 6O2
What other requirements are necessary for this reaction to occur?
chlorophyll and nitrogen
chlorophyll and sunlight
sunlight and ethanol
sunlight and nitrogen
Which structure describes an ATP molecule?
phosphate, deoxyribose, and 3 adenine groups
phosphate, glucose, and 3 adenine groups
adenine, ribose, and 3 phosphate groups
adenine, thymine, and 3 phosphate groups
What is the role of chlorophyll in photosynthesis?
It converts light energy to energy contained in chemical bonds.
It breaks the hydrogen bonds in water molecules.
It converts water and carbon dioxide to sugar.
It provides the energy needed for the light dependent reactions.
In the process of photosynthesis, the light-dependent reactions produce energy storing compounds that are used during the dark reactions. What are these energy storing compounds?
ATP and NADPH
carbon dioxide and glucose
glucose and ATP
NADPH and glucose
A student argues that cellular respiration stops if the temperature of a cell is too high. What would cause respiration to stop under high temperatures?
Glucose is not available.
The cell becomes dormant.
Enzymes denature.
Oxygen levels are too low.
