Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET 2004
Exam
NEET
Year
2004
Subject
Botany
Chapter
Biological Classification

NEET 2004 · Botany · Biological Classification

Which of the following statements is not true for retroviruses?

Which of the following statements is not true for retroviruses?

Options

  1. ADNA is not present at any stage in the life cycle of retroviruses
  2. BRetroviruses carry gene for RNAdependent DNA polymerase
  3. CThe genetic material in mature retroviruses is RNA
  4. DRetroviruses are causative agents for certain kinds of cancer in man.

Correct answer

A. DNA is not present at any stage in the life cycle of retroviruses

Step-by-step solution

Retrovirus once it has infected a cell, it converts its RNA into DNA by reverse transcription. This viral DNA is then inserted into the DNA of the host cell where it starts replicating. For e.g., Human Immunodeficiency Virus (HIV). Related Theory Difference Between Retrovirus and Virus <tableclass="qx−match−listqx−match−table"border="1"cellpadding="6"cellspacing="0"><tr><td>Retrovirus<table class="qx-match-list qx-match-table" border="1" cellpadding="6" cellspacing="0"><tr><td>RetrovirusVirusThesehaveRNAasgeneticmaterial.\begin{array}{l} These have RNA as genetic material. \end{array}ThesehaveRNAandDNAasthegeneticmaterial.\begin{array}{l} These have RNA and DNA as the genetic material. \end{array}Theyundergoreversetranscriptionto</td></tr><tr><td>converttheRNAintoDNA.\begin{array}{l} They undergo reverse transcription to</td></tr><tr><td>convert the RNA into DNA. \end{array}OnlyRNAvirusesundergoreversetranscription.\begin{array}{l} Only RNA viruses undergo reverse transcription. \end{array}Diplopoda</td><td></td><td>Head+thorax+abdomen\begin{array}{l} Head + thorax + abdomen \end{array}</td></tr><tr><td>Insecta</td></tr><tr><td>InsectaHead+thorax+abdomen\begin{array}{l} Head + thorax + abdomen \end{array}OnychophoraUnsegmented bodyMerostomaCephalothoraxArachnidaCephalothorax
Practice Biological Classification on Quantrex Academy →

More from Biological Classification

Match List-I with List-II . List-I List-II A. Spherical I. Vibrio B. Rod II. Cocci C.… NEET 2026Symbiotic association between fungi and algae are called __________. NEET 2026The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969)… NEET 2026Mad cow disease is caused by __________. NEET 2026Match List-I with List-II . List-I List-II A. Fusion of protoplasms between gametes I.… NEET 2026Which of the following is not a prokaryote ? NEET 2026Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange… NEET 2025Match List I with List II List-I List-II A. Rhizopus I. Mushroom B. Ustilago II. Smut… NEET 2024 Full Biological Classification list All NEET PYQs