54. Which of the following is not true of microbial size? A. The largest organis

Question

54. Which of the following is not true of microbial size? A. The largest organism in the world may be a large fungus which occupies 32, >2,000 acres in Oregon's Blue Mountains. B. The largest helminth is the dog tapeworm which may exceed 25 feet. C. Among the smallest of living cells are the mycoplasmas and chlamydial elementary bodies. D. Some bacteria are larger than the protozoan Paramecium and may be seen by the naked eye. E. Some viruses are huge with genomes and size greater than some bacteria. 55. Which is true of competitive inhibition? A. It involves an allosteric enzyme. B. Substrate and inhibitor can both bind to the active site. C. Sulfonamides are competitive inhibitors of PABA (para-aminobenzoic acid). D. Alter the Km. E. B,C, and D 56. Which of the following is false concerning the major classes of enzymes? A. Isomerases catalyze atomic rearrangements within molecules. B. Transferases catalyze transfer of functional groups (e.g. amino, methyl, phosphate). C. Hydrolases catalyze polymerization of macromolecules (e.g. amino acids->proteins) by removal of water. D. Oxidoreductases catalyze oxidation reduction reactions. E. all of the above are true. 57. Which of the following elements is critical for the electron transport process? A. zinc. B. iron. C. manganese. D. magnesium. E. cobalt 58. Which of the following is false concerning viral replication? A. Viral genes direct host cells into replicating viral nucleic acids, capsid proteins, and viral enzymes (if present) B. DNA bacteriophages and animal DNA viruses replicate in the nucleus of the cell. C. With a single stranded +strand RNA virus, the viral genome can act directly as an mRNA. D. With the retroviruses (e.g. HIV CD4+ T cell are infected); the reverse transcriptase copies a single strand of DNA on the viral template, the DNA becomes double stranded and is inserted into the host genome. all of the above are true. E.

Explanation / Answer

54) Option E is incorrect as no viruses are larger in size in comparison with bacteria

55) E . All B,C and D options are correct.

56) Option C is incorrect statement because hydrolase enzyme hydrolysis the chemical bond instead of polymerization of macromolecules.

57) Iron ion as it is the ion present in cytochrome c.

58) Option B is incorrect because DNA bacteriophages which infect the bacterial cells cannot replicate themselves inside nucleus as bacteria don't have well defined nucleus in their cell.

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.