Discussion
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- Question
When living organisms are cooled below some critical body temperature, the metabolic reactions within their cells cease to function properly. This malfunction occurs because
Options- A. their enzymes lose the proper three-dimensional shape
- B. enzyme active sites become permanently bound to substrates
- C. the activation energy for the reaction is raised
- D. there is insufficient molecular motion for substrates to interact
- Correct Answer
- there is insufficient molecular motion for substrates to interact
- 1. Oxidation of a molecule involves
Options- A. gain of electron
- B. loss of electron
- C. gain of proton
- D. loss of proton Discuss
- 2. The elements oxygen, nitrogen, and carbon
Options- A. can all form covalent bonds with other elements
- B. contain protons and neutrons in their atomic nuclei
- C. are common elements in the molecules that make up living organisms
- D. All of the above Discuss
- 3. Which of the following amino acids can interact with the DNA or RNA nucleotide bases via hydrogen bonding?
Options- A. Asn and Gln
- B. Cys and Met
- C. Lys and Leu
- D. Ile and Val Discuss
- 4. H2O and CH4 are both examples of
Options- A. molecules
- B. ions
- C. acids
- D. none of these Discuss
- 5. Which of the following immune cells would have an especially low count in a patient with advanced AIDS?
Options- A. Killer T lymphocytes
- B. Helper T lymphocyte
- C. B lymphocytes
- D. None of these Discuss
- 6. An autoimmune disease is
Options- A. AIDS
- B. Measles
- C. Lupus
- D. Mumps Discuss
- 7. Southern blotting involves
Options- A. electrophoresis of DNA molecules and then blotting the separated DNA bands followed by incubation
- B. electrophoresis of DNA molecules and then blotting the separated RNA bands followed by incubation
- C. electrophoresis of DNA molecules followed by incubation
- D. electrophoresis of RNA molecules and then blotting the separated RNA bands followed by incubation Discuss
- 8. The lowest energy value lipid for human nutrition is
Options- A. olive oil
- B. olestra
- C. margarine
- D. cardiolipih Discuss
- 9. The main function of antibodies is to
Options- A. kill all the foreign bodies
- B. generate antigens, thus conferring immunization
- C. protect the circulatory system
- D. chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease Discuss
- 10. Nucleotide bases and aromatic amino acids absorb light respectively at
Options- A. 280 and 260 nm
- B. 260 and 280 nm
- C. 270 and 280 nm
- D. 260 and 270 nm Discuss
More questions
Correct Answer: loss of electron
Correct Answer: All of the above
Correct Answer: Asn and Gln
Correct Answer: molecules
Correct Answer: Helper T lymphocyte
Correct Answer: Lupus
Correct Answer: electrophoresis of DNA molecules and then blotting the separated DNA bands followed by incubation
Correct Answer: olestra
Correct Answer: chemically combine with the antigen which induces it, inactivate the antigen and protect the body from disease
Correct Answer: 260 and 280 nm
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