Description : Another name for reverse transcriptase is (A) DNA dependent DNA polymerase (B) DNA dependent RNA polymerase (C) RNA dependent DNA polymerase (D) RNA dependent RNA polymerase
Last Answer : Answer : C
Description : DNA directed RNA polymerase is (A) Replicase (B) Transcriptase (C) Reverse transcriptase (D) Polymerase III
Last Answer : Answer : B
Description : The only correct statement about oncoviruses is (A) All the oncoviruses are RNA viruses (B) Reverse transcriptase is present in all oncoviruses (C) Viral oncogenes are identical to human protooncogens (D) Both DNA and RNA viruses can be oncoviruses
Last Answer : Answer : D
Description : Reverse transcriptase catalyses (A) Synthesis of RNA (B) Breakdown of RNA (C) Synthesis of DNA (D) Breakdown of DNA
Description : All of the following statements about RNA-dependent DNA polymerase are true except: (A) It synthesizes DNA using RNA as a template (B) It is also known as reverse transcriptase (C) It synthesizes DNA in 5’→3’ direction (D) It is present in all the viruses
Description : In which organism did the reverse transcriptase enzyme which performs DNA synthesis from RNA templates first appear?
Last Answer : Need answer
Description : RNA interference involves (a) synthesis of cDNA and RNA using reverse transcriptase (b) silencing of specific mRNA due to complementary RNA (c) interference of RNA in synthesis of DNA (d) synthesis of mRNA from DNA
Last Answer : (b) silencing of specific mRNA due to complementary RNA
Description : Which one of the following makes use of RNA template to synthesise DNA? (a) DNA polymerase (b) RNA polymerase (c) Reverse transcriptase (d) DNA dependant RNA polymerase
Last Answer : c) Reverse transcriptase
Description : Retroviruses are so-named because their reverse transcriptase _____. a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA. b. reverses the normal ... the action of drugs on viruses and allows them to continue multiplying in living cells.
Last Answer : a. reverses the flow of genetic information by stimulating information to proceed from RNA to DNA.
Description : RNA directed DNA polymerase is (A) Replicase (B) Transcriptase (C) Reversetranscriptase (D) Polymerase–III
Description : Reverse transcriptase activity is present in the eukaryotic: (A) DNA polymerase α (B) DNA polymerase γ (C) Telomerase (D) DNA polymerase II
Description : Which of the following is correct regarding AIDS causative agent HIV? (a) HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase. (b) HIV ... ) HIV is unenveloped retrovirus. (d) HIV does not escape but attacks the acquired immune response
Last Answer : (d) HIV does not escape but attacks the acquired immune response.
Description : At which stage of HIV infection does one usually show symptoms of AIDS? (a) Within 15 days of sexual contact with an infected person (b) When the infected retro virus enters host cells (c) ... large number of helper T - lymphocytes (d) When the viral DNA is produced by reverse transcriptase
Last Answer : (c) When HIV damages large number of helper T - lymphocytes
Description : The following are true about DNA synthesis: a. it requires DNA polymerase b. reverse transcriptase enzymes are involved c. moves in a 5'---> 3' direction d. the rate of error in DNA synthesis is 1 in 105 base pairs
Last Answer : it requires DNA polymerase
Description : The mechanism of synthesis of DNA and RNA are similar in all the following ways except (A) They involve release of pyrophosphate from each nucleotide added (B) They require activated nucleotide precursor and Mg2+ (C) The direction of synthesis is 5’ → 3’ (D) They require a primer
Last Answer : Answer : A
Description : Mitochondria and chloroplast are (A) semi-autonomous organelles (B) formed by division of pre-existing organelles and they contain DNA but lack protein synthesising machinery. Which one of the following options is correct? (a) ( ... Both (A) and (B) are correct. (d) (B) is true but (A) is false.
Last Answer : (a) (A) is true but (B) is false.
Description : DNA replication means (a) DNA → DNA (b) DNA → RNA (c) Autocatalytic function of DNA (d) Heterocatalytic function of DNA
Last Answer : Ans:(a)
Description : Polyadenylate tail is not present in mRNA synthesising (A) Globin (B) Histone (C) Apoferritin (D) Growth hormone
Description : One of the first enzymes synthesized by many bacteriophage is __________ , an RNA dependent RNA polymerase A.RNA transcriptase B.RNA polymerase C.RNA ligase D.RNA replicase
Last Answer : D.RNA replicase
Description : What are retroviruses? How do they reproduce and what is the role of the enzyme reverse transcriptase?
Last Answer : Retroviruses are viruses whose genetic material is RNA. HIV and the virus of SARS (severe acute respiratory syndrome) are examples of retrovirus. These viruses inoculate their RNA into the host cell ... virus and it is also inoculated into the host cell. Virus Review - Image Diversity: retrovirus
Description : HIV often changes its shape due to the presence of an enzyme called (1) Reverse Transcriptase (2) Enterokinase (3) Nucleotidase (4) Nucleoditase
Last Answer : (1) Reverse Transcriptase Explanation: Use of the reverse transcriptase enzyme is a unique characteristic of retroviruses such as HIV. After the virus releases its genetic material into a host cell, ... viral RNA into a complementary piece of DNA. This process is known as 'reverse transcription'.
Description : The enzyme reverse transcriptase helps in the
Last Answer : synthesis of DNA in the host cell.
Description : Which of the following viruses is a retrovirus with reverse transcriptase? a. HPV b. polio c. HIV d. Ebola
Last Answer : c. HIV
Description : The initial regimen for antiretroviral therapy of previously untreated HIV patient consist of: A. Two nucleoside reverse transcriptase inhibitors (NRTIs) + one protease inhibitor (PI) B. Two NRTIs + one non-NRTI C. Three NRTIs D. Any of the above
Last Answer : D. Any of the above
Description : ndicate the anti-HIV regimen that is generally reserved for advanced cases of AIDS or for repeated treatment failures: A. Two nucleoside reverse transcriptase inhibitors (NRTIs) + one protease inhibitor (PI) B. Three NRTIs C. Two NRTIs + one non-NRTI D. One NRTI + one non-NRTI + one PI
Last Answer : D. One NRTI + one non-NRTI + one PI
Description : According to current guidelines, previously untreated symptomatic HIV patients should be treated with: A. Zidovudine alone B. Zidovudine + zalcitabine C. Zidovudine + indinavir D. Any two nucleoside reverse transcriptase inhibitors + one protease inhibito
Last Answer : D. Any two nucleoside reverse transcriptase inhibitors + one protease inhibitor
Description : Select the drug which directly inhibits HIV-reverse transcriptase without the need for intracellular activation by phosphorylation: A. Nelfinavir B. Nevirapine C. Stavudine D. Didanosine
Last Answer : B. Nevirapine
Description : The virus directed reverse transcriptase enzyme is inhibited by: A. Amantadine B. Zidovudine C. Vidarabine D. Acyclovir
Last Answer : B. Zidovudine
Last Answer : Reverse Transcriptase
Description : Direction of RNA synthesis is (A) 5′ → 3’ (B) 3′ → 5’ (C) Both (A) and (B) (D) None of these
Description : Manipulation of DNA in genetic engineering became possible due to the discovery of (a) restriction endonuclease (b) DNA ligase (c) transcriptase (d) primase
Last Answer : (a) restriction endonuclease
Description : Direction of DNA synthesis is (A) 5’ → 3’ (B) 3’ → 5’ (C) Both (A) and (B) (D) None of these
Description : CPM is (A) Synthesising in concepts (B) Is built of activities oriented programme (C) Is based on time estimate (D) All the above
Last Answer : (D) All the above
Description : The smallest unit of DNA capable of coding for the synthesis of a polypeptide is (A) Operon (B) Repressor gene (C) Cistron (D) Replicon
Description : mRNA is synthesised on DNA template in which direction? (a) 5′ → 3′ (b) 3′ → 5′ (c) Both (a) and (b) (d) Any
Last Answer : a) 5′ → 3′
Last Answer : (a) 5′ → 3′
Description : n the DNA molecule, (a) the proportion of adenine in relation to thymine varies with the organism (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → ... is not always equal (d) there are two strands which run parallel in the 5′ → 3′ direction.
Last Answer : (b) there are two strands which run anti- parallel-one in 5′ → 3′ direction and other in 3′ → 5′
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oncogenes
Description : The mechanism of synthesis of DNA and RNA are similar to all the following ways except (A) They involve release of pyrophosphate from each nucleotide added (B) They require activated nucleotide precursor and Mg2+ (C) The direction of synthesis is (D) They require a primer
Description : The binding of prokaryotic DNA dependent RNA polymerase to promoter sits of genes is inhibited by the antibiotic: (A) Streptomycin (B) Rifamcin (C) Aueromycin (D) Puromycin
Description : The normal function of restriction endonucleases is to (A) Excise introns from hrRNA (B) Polymerize nucleotides to form RNA (C) Remove primer from okazaki fragments (D) Protect bacteria from foreign DNA
Description : In the process of transcription, the flow of genetic information is from (A) DNA to DNA (B) DNA to protein (C) RNA to protein (D) DNA to RNA
Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides
Description : Orcinol method is employed in the quantitation of (A) Nucleic acid (B) DNA (C) RNA (D) Proteins
Description : Diphenylamine method is employed in the quantitation of (A) Nucleic acid (B) RNA (C) DNA (D) Proteins
Description : Template-directed DNA synthesis occurs in all the following except (A) The replication fork (B) Polymerase chain reaction (C) Growth of RNA tumor viruses (D) Expression of oneogenes
Description : Unit of genetic information: (A) DNA (B) RNA (C) Cistron (D) None of these
Description : Genetic information in human beings is stored in (A) RNA (B) DNA (C) Both (A) and (B) (D) mRNA
Description : If in a nucleic acid there are more than 8000 nucleotides it is most likely (A) RNA (B) DNA (C) Both (A) and (B) (D) None of these
Description : Genetic information in human beings is stored in (A) DNA (B) RNA (C) Both (A) and (B) (D) None of these