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- Question
In DNA double helix, the two DNA chains are held together by
Options- A. covalent bonds between the pair of bases
- B. hydrogen bonds between the pair of bases
- C. ionic bonds between the pair of bases
- D. none of the above
- Correct Answer
- hydrogen bonds between the pair of bases
- 1. A solution with pH = 5 is __________ than a solution with pH = 7.
Options- A. 2 times more basic
- B. 10 times more basic
- C. 10 times more acidic
- D. 100 times more acidic Discuss
- 2. The prosthetic group biotin is a carrier of which type of molecule?
Options- A. Activated carbon dioxide (CO2)
- B. Ammonia
- C. Methyl group
- D. Sulfhydryl group Discuss
- 3. The carbon dioxide is primary a product of
Options- A. Krebs cycle
- B. glycolysis
- C. electron transport phosphorylation.
- D. lactate fermentation. Discuss
- 4. Which of the following are reduced coenzymes?
Options- A. NADH and FADH2
- B. NAD+ and FAD
- C. ATP and GTP
- D. Coenzyme A and ubiquinone Discuss
- 5. Which of the following statement is incorrect?
Options- A. The principal lipophilic hormones that binds to receptors located in the plasma membranes are prostaglandins
- B. Prostaglandins are synthesized from arachidonic acid
- C. Prostaglandins act as paracrine signaling molecules
- D. None of the above Discuss
- 6. Taylor, Woods and Hughes labeled Vicia DNA by allowing new DNA synthesis in the presence of radioactive thymine. After DNA replication (S phase of the cell cycle), it was observed that
Options- A. only one chromatid of a chromosome was labeled
- B. both chromatids of a chromosome were labeled
- C. both (a) and (b)
- D. neither chromatid was labeled Discuss
- 7. Pinocytosis occurs in
Options- A. all eukaryotic cells
- B. all prokaryotic cells
- C. mitochondria of all cells
- D. none of these Discuss
- 8. The lone pair electrons on oxygen in a H20 molecule
Options- A. carry a partial positive charge
- B. are not important for the properties of water
- C. carry a partial negative charge
- D. form covalent bonds in ice Discuss
- 9. Which of the following is not an essential amino acid?
Options- A. Aspartic acid
- B. Glutamic acid
- C. Glycine
- D. All of these Discuss
- 10. The reason that fats contain more energy than simple sugars, is fats have many more
Options- A. carbon atoms
- B. hydrogen atoms
- C. covalent bonds
- D. hydrogen bonds Discuss
More questions
Correct Answer: 100 times more acidic
Correct Answer: Activated carbon dioxide (CO2)
Correct Answer: Krebs cycle
Correct Answer: NADH and FADH2
Correct Answer: None of the above
Correct Answer: both chromatids of a chromosome were labeled
Correct Answer: all eukaryotic cells
Correct Answer: carry a partial negative charge
Correct Answer: All of these
Correct Answer: covalent bonds
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