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- Question
Which of the following is true of enzymes?
Options- A. Enzymes lowers the activation energy for the chemical reaction
- B. Enzymes speed up the rate of a chemical reaction
- C. Both A & B
- D. Neither A nor B
- Correct Answer
- Both A & B
ExplanationEnzymes are macromolecular biological catalysts. Enzymes accelerate chemical reactions. The molecules upon which enzymes may act are called substrates and the enzyme converts the substrates into different molecules known as products.
- 1. Which organelles are unique to plant cells?
Options- A. Central vacuole
- B. Chlorophyll
- C. Cell wall
- D. All of the above Discuss
- 2. The functional unit of the nervous system is the
Options- A. Nephrons
- B. Axons
- C. Neurons
- D. All of the above Discuss
- 3. Where are the proteins of the electron transport chain located?
Options- A. mitochondrial matrix
- B. mitochondrial inner membrane
- C. mitochondrial outer membrane
- D. mitochondrial intermembrane space Discuss
- 4. Which of the following is true of osmosis?
Options- A. it is a type of diffusion
- B. movement is against water's concentration gradient
- C. requires energy
- D. All of the above Discuss
- 5. The two purines in DNA are
Options- A. Adenine & Thymine
- B. Thymine & Uracil
- C. Guanine & Uracil
- D. Adenine & Guanine Discuss
- 6. Which plant cell organelle contains its own dna and ribosomes?
Options- A. mitochondria
- B. Chloroplasts
- C. Both A & B
- D. Vacuole Discuss
- 7. When does DNA replication happen?
Options- A. S - phase
- B. M - Phase
- C. Prophase
- D. Anaphase Discuss
- 8. Which of the following is not true of color blindness?
Options- A. Color blind people learn to rely on shapes, patterns, and positions of signs and signals.
- B. Red-green color blindness is the most common type of color blindness.
- C. A color blind person cannot see any colors.
- D. For some people, it might be difficult to recognize colors of traffic lights and signs. Discuss
- 9. All bones stop growing by the end of adolescence.
Options- A. TRUE
- B. FALSE Discuss
- 10. The organs of the urinary system are
Options- A. Kidney
- B. Urinary bladder
- C. Ureter
- D. All of the above Discuss
Biology problems
Search Results
Correct Answer: All of the above
Correct Answer: Neurons
Correct Answer: mitochondrial inner membrane
Explanation:
The proteins of the electron transport chain are present in mitochondrial inner membrane in Eukaryotes.
Correct Answer: All of the above
Correct Answer: Adenine & Guanine
Explanation:
The purines are bases in the DNA. The two purines in DNA are Adenine and Guanine. These two purines forms hydrogen bonds with their complimentary pyrimidines such as Thymine and Cytosine to keep the two rails of the DNA molecule together.
Correct Answer: Both A & B
Explanation:
The plant cell organelles, "The power house of the cell" mitochondria and the chloroplasts contains their own DNA and ribosomes.
Correct Answer: S - phase
Explanation:
DNA is replicated during the S-Phase in the interphase of a cell.
Correct Answer: A color blind person cannot see any colors.
Correct Answer: FALSE
Explanation:
The given statement "All bones stop growing by the end of adolescence" is a FALSE statement.
Correct Answer: All of the above
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