Question

9.) During the process of DNA replication, both DNA polymerase and RNA polymerase are involved in eventually creating the new daughter strand of DNA. T or F

10.) Replication begins at the origin of replication or ORI and transcription begins at the first codon for methionine. T or F

11.) The process of mapping, sequencing and analysis of proteins is called genomics. T or F

12.) The heavy chain constant domains of a given immunoglobulin molecule define its class. T or F (user thinks its true)

13.) Leukocidins kill phagocytes and it is the dead phagocytes that make up much of the substance of pus. T or F (user thinks its true)

14.) The primary antibody response is generally detectable within 24 hours. T or F

15.) The term virulence refers to the ability of a host cell to defend itself by using innate systems like the interferon system. T or F

16.) Transduction is the uptake of DNA through the cell wall of bacteria while transformation is the gain of DNA by bacteriophage virus infection of prokaryotes. T or F (user thinks its true)

Answer 1

Question 9: The statement is False.

Explanation: During DNA replication, DNA polymerase creates the new daughter strand of DNA. RNA polymerase is involved in the process transcription, by which RNA polymerase creates the strand of RNA using the strand of DNA as a template.  

Question 10: The statement is False.

Explanation: Replication begins at the origin of replication or ORI but transcription begins at the promoter (it is the DNA sequence). The start codon is the first codon of mRNA, from where protein synthesis starts.

Question 11: The statement is False.

Explanation: The process of mapping, sequencing of DNA is a part of genomics but analysis of proteins is called proteomics.

Question 12: The statement is True.

Explanation: The five different types of heavy chains have been identified and these are ,, , and . The heavy-chains of a given antibody molecule determine the class of that antibody: IgM ( ), IgG (), IgA (), IgD () or IgE (). The variable region (V_H) of the heavy-chains is about 110 amino acids long, but the heavy-chain constant region (C_H) is about three to four times longer (330 or440 amino acids), depending on the classes of antibody.

Question 13: The statement is True.

Explanation: Some intracellular pathogens produce a type of cytotoxin and that is leukocidins that kill phagocytes and it is the dead phagocytes that make up much of the substance of pus.

Question 14: The statement is False.

Explanation: The first exposure of an individual to an immunogen is referred to as the primary immunization, which generates a primary response. The primary antibody response is detectable only after 5-10 days of primary immunization.

Question 15: The statement is False.

Explanation: The term virulence is defined as the ability of a pathogen to infect a host cell.

Question 16: The statement is False.

Explanation: Transformation is the uptake of DNA through the cell wall of bacteria whereas transduction is the gain of DNA by bacteriophage virus infection of prokaryotes.