21. Within a cell, energy released by electrons is often used to phosphorylate w

Question

21. Within a cell, energy released by electrons is often used to phosphorylate which of the following molecules?

ADP

ATP

Pyruvate ions

Oxygen

NAD

22. All of the following apply to glycolysis except

Occurs without oxygen

Degrades glucose to H2O and CO2

Ends with formation of pyruvic acid

Occurs during fermentation

23. In which of the phases of cellular respiration is the majority of ATP formed?

Processing of pyruvic acid for the Krebs cycle

Electron transport chain

Glycolysis

The Krebs cycle

All phases produce the same number of ATP molecules

24. The energy of the sun is converted into usable energy for the cell in the form of _________.

ADP

ATP

Glucose

CO2

25. The starting materials of photosynthesis are _____________

Oxygen and glucose

Carbon dioxide and oxygen

Carbon dioxide and water

Oxygen and water

26. What type of macro-molecule is frequently an enzyme?

Carbohydrate

Nucleic acid

Lipid

Protein

27. What function do enzymes perform?

Increase substrate concentration

Increase the temperature

Increase the activation energy required for a reaction to occur

Decrease the activation energy required for a reaction to occur

28. The most important aspect of cellular respiration is that ___________________

It is the process that occurs only in animal cells

It is the process that utilizes fat as its primary energy source

It is the process that enables living organisms to utilize the energy stored in glucose

It is the only cellular process that yields ATP

29. The statement best describes the relationship between plants and animals on earth is

Plants produce O2 and sugars from CO2

Animals produce CO2 and H2O from sugars and O2

Plants produce O2 and sugars and animals produce CO2 and H2O

Animals produce O2 and sugars and plants produce CO2 and H2O

30. What is the function of the ribosome?

Digestion

RNA duplication

Mobility

Protein synthesis

Explanation / Answer

Answer:

21) ADP

22) Degrades glucose to H2O and CO2

23) Electron transport chain

24) ATP

25) Carbon dioxide and water

26) Protein

27) Decrease the activation energy required for a reaction to occur

28)It is the only cellular process that yields ATP

29)Plants produce O2 and sugars and animals produce CO2 and H2O

30)Protein synthesis

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