Respiration in Plants

Which statement about respiration in plants is correct?

1. Respiration occurs only during the daytime.
2. Respiration occurs only in green tissues.
3. Respiration occurs continuously in all living cells.
4. Respiration occurs only in mitochondria.

Which respiratory substrate yields the lowest respiratory quotient (RQ)?

1. Carbohydrates
2. Organic acids
3. Proteins
4. Fats

Anaerobic respiration in plant cells generally produces:

1. Water and oxygen
2. Ethanol and carbon dioxide
3. Lactic acid and oxygen
4. Acetyl-CoA and ATP

During respiration, ATP is synthesized mainly by:

1. Chlorophyll
2. ATP synthase
3. DNA polymerase
4. Rubisco

Which of the following is NOT produced during aerobic respiration?

1. Carbon dioxide
2. Water
3. ATP
4. Lactic acid

The complete oxidation of one molecule of glucose mainly yields:

1. 2 ATP
2. 8 ATP
3. 36-38 ATP
4. 100 ATP

Which respiratory quotient (RQ) is obtained when carbohydrates are used as respiratory substrates?

1. 0.5
2. 0.7
3. 1.0
4. 1.5

Alcoholic fermentation in yeast produces:

1. Lactic acid and ATP
2. Ethanol and carbon dioxide
3. Acetyl-CoA and oxygen
4. Glucose and ATP

The final electron acceptor in aerobic respiration is:

1. Carbon dioxide
2. Oxygen
3. NADH
4. Pyruvate

Which process produces the maximum amount of ATP during aerobic respiration?

1. Glycolysis
2. Krebs cycle
3. Electron Transport System
4. Fermentation

The Krebs cycle takes place in the:

1. Cytoplasm
2. Chloroplast
3. Mitochondrial matrix
4. Nucleus

Which organelle is known as the powerhouse of the cell?

1. Ribosome
2. Chloroplast
3. Mitochondrion
4. Golgi apparatus

The end product of glycolysis is:

1. Acetyl-CoA
2. Lactic acid
3. Pyruvic acid
4. Ethanol

Glycolysis occurs in the:

1. Nucleus
2. Cytoplasm
3. Mitochondrial matrix
4. Chloroplast

What is the primary purpose of respiration in plants?

1. To produce glucose
2. To release energy from food molecules
3. To absorb water from the soil
4. To synthesize chlorophyll