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- Question
The NADPH required for the calvin cycle comes from
Options- A. Reactions initiated in photosystem 1
- B. Citric acid cycle
- C. Reactions initiated in photosystem 2
- D. Glycolysis
- Correct Answer
- Reactions initiated in photosystem 2
ExplanationATP and NADPH produced by the light reactions are used in the Calvin cycle to reduce carbon dioxide to sugar. The Calvin cycle is similar to the Krebs cycle in that the starting material is regenerated by the end of the cycle.
- 1. The term aerotolerant anaerobe refers to an organism that
Options- A. uses oxygen or grows without oxygen.
- B. requires more oxygen than is present in air.
- C. does not use oxygen but tolerates it.
- D. requires less oxygen than is present in air. Discuss
- 2. The storage form of glucose in animals is
Options- A. Starch
- B. Glucose
- C. Glycogen
- D. None of the above Discuss
- 3. Localized area of pus formation in the lungs is
Options- A. Pulmonary embolism
- B. Pulmonary abscess
- C. Pleurisy
- D. Pulmonary edema Discuss
- 4. Hormones are chemicals secreted and regulated by the endocrine system.
Options- A. TRUE
- B. FALSE Discuss
- 5. When is genetic drift a major factor in evolution?
Options- A. When there is male competition
- B. When there is artificial selection
- C. When there is no selective pressure
- D. When there is disruptiveselection Discuss
- 6. Which of the following occurred in the presence of tetrodotoxin?
Options- A. The number of action potentials decreased.
- B. The size of the action potential increased.
- C. The number of action potentials increased.
- D. The size of the action potential decreased. Discuss
- 7. Which best matches the description with the genetic material?
Options- A. Chromosomes are located in the cytoplasm.
- B. DNA is located in the nucleus.
- C. Nucleotides form a helical structure that is called a gene.
- D. Chromosomes create genes. Discuss
- 8. What process never occurs in interphase? Discuss
- 9. Which of the following is not a function of saliva?
Options- A. contains fluoride to harden the tooth enamel
- B. moistens food and helps stick it together to make it easier to swallow
- C. begins the chemical breakdown of starches
- D. helps clean the mouth Discuss
- 10. Floridian starch is characteristic energy storage material of which algae?
Options- A. Blue green algae
- B. Brown algae
- C. Red algae
- D. Green algae Discuss
Biology problems
Search Results
Correct Answer: does not use oxygen but tolerates it.
Correct Answer: Glycogen
Explanation:
Glycogen is the storage form of glucose in animals and humans which is analogous to the starch in plants. Glycogen is synthesized and stored mainly in the liver and the muscles.
Correct Answer: Pulmonary abscess
Correct Answer: TRUE
Explanation:
True. Hormones are chemicals secreted and regulated by the endocrine system.
Correct Answer: When there is no selective pressure
Explanation:
Genetic drift or allelic drift is the change in the relative frequency in which a gene variant (allele) occurs in a population due to random sampling and chance.
When is genetic drift a major factor in evolution is
* When there is low gene flow.
* When there is no selective pressure.
* When there is a bottleneck.
Correct Answer: The number of action potentials decreased.
Correct Answer: DNA is located in the nucleus.
Explanation:
DNA is the genetic material in the cell.
Hence, option B) DNA is located in the nucleus best matches the description with the genetic material.
Correct Answer: Absence of cell division is the process that never comes in interphase
Correct Answer: contains fluoride to harden the tooth enamel
Explanation:
Saliva is produced by the salivary gland which helps in food digestion.
Option A) contains fluoride to harden the tooth enamel is not the function of saliva.
Correct Answer: Red algae
Explanation:
The floridian starch is reserve food materials in the red algae or the members of class Rhodophytae. It is a characteristic feature of this group.
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