MCQs – Multiple-Choice Questions.

Date: 2015-10-07; view: 473.

1. In which process is tRNA involved? (1)
1. Recombination
2. Replication
3. Transcription
4. Translation
2. DNA replication is: (1)
1. Conservative
2. Dispersive
3. Semi-conservative
3. Which two processes involve the unwinding (uncoiling) of the DNA double helix and its separation into two strands of nucleotides? (1)
1. Replication and telophase of mitosis
2. Telophase of mitosis and translation
3. Translation and transcription
4. Transcription and replication
4. A certain gene codes for a polypeptide that is 120 amino acids long. How many nucleotides long is the mRNA that codes for this polypeptide likely to be? (1)
1. 30
2. 40
3. 360
4. 480
5. Which of the following are connected by hydrogen bonds? (1)
1. The hydrogen and oxygen atoms of a water molecule
2. A base pair of DNA molecule
3. Two amino acid molecules of a dipeptide
4. Two glucose molecules in a disaccharide
6. Where do transcription and translation occur in eukaryotic cells? (1)
1. Cytoplasm, cytoplasm
2. Cytoplasm, mitochondria
3. Nucleus, cytoplasm
4. Nucleus, nucleus

7.What is cell respiration? (1)

a. Taking air into the lungs

b. Removing carbon dioxide from the lungs

c. Use of ATP in cells

d. Controlled release of energy in cells

8. What are the products of glycolysis? (1)

a. Glucose

b. Glucose and ATP

c. ATP and pyruvate

d. Glucose, ATP and pyruvate

9. Which substances are produced by yeast in anaerobic cell respiration? (1)

a. Carbon dioxide and lactate

b. Carbon dioxide and ethanol

c. Lactate and ethanol

d. Carbon dioxide, lactate and ethanol

10. If blood sample from a person contains a high concentration of lactate, what is the conclusion? (1)

a. The person has been drinking too much milk and ingested large amounts of lactose

b. The person is lactose intolerant and should change to drinking lactose-free milk

c. The person has eaten live yoghurt, containing bacteria that have carried out anaerobic cell respiration

d. The person has exercised vigorously and carried out anaerobic cell respiration

11. Where is pyruvate produced and used in a cell respiring aerobically? (1)

a. In the cytoplasm, in the cytoplasm

b. In the cytoplasm, in the mitochondrion

c. In the mitochondrion, in the cytoplasm

d. In the mitochondrion, in the mitochondrion

12. What is the main source of energy in aerobic cell respiration? (1)

a. Oxygen

b. ATP

c. Heat

d. Organic compounds

13. Of the following products, which is produced by both anaerobic respiration and aerobic respiration in humans: 1) Pyruvate, 2) ATP, 3) Lactate (1)

a. 1 only

b. 1 and 2 only

c. 1, 2 and 3 only

d. 2 and 3 only

14. Pigments are extracted from the leaves of a green plant. White light is then passed through the solution of pigments. What effect do the leaf pigments have on the white light? (1)

a. Green wavelengths are absorbed and red and blue wavelengths are transmitted

b. Red and blue wavelengths are absorbed and green wavelengths are transmitted

c. Blue wavelengths are absorbed and green and red wavelengths are transmitted

d. Green and red wavelengths are absorbed and blue wavelengths are transmitted