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Biological Classification · Question 103

AIPMT 2002MCQEasy📈 Topic in 25% papers+4−1
1

Which statement is correct for bacterial transduction?

  1. Transfer of some genes from one bacterium to another bacterium through virus.
  2. Transfer of genes from one bacterium to another bacterium by conjugation.
  3. Bacterium obtained its DNA directly from mother cell.
  4. Bacterium obtained DNA from other external source.

Answer

(1) Transfer of some genes from one bacterium to another bacterium through virus.

Solution

Bacteria show three types of gene transfer (sexual reproduction by DNA transfer):

Conjugation – transfer of DNA through direct cell-to-cell contact.

Transformation – uptake of naked DNA from the surroundings.

Transduction – transfer of genes from one bacterium to another through a bacteriophage (virus).

∴ Transduction is the transfer of some genes from one bacterium to another bacterium through a virus.

Answer: (1)

AIPMT 2002

Keep practising — Biological Classification

2

Which fungal disease spreads by seed and flowers?

  1. Loose smut of wheat
  2. Corn smut
  3. Covered smut of barley
  4. Soft rot of potato
AIPMT 2002
3

Which of the following secretes toxins during storage conditions of crop plants?

  1. Aspergillus
  2. Penicillium
  3. Fusarium
  4. Colletotrichum
AIPMT 2002
4

In which of the following animals dimorphic nucleus is found?

  1. Amoeba proteus
  2. Trypanosoma gambiense
  3. Plasmodium vivax
  4. Paramecium caudatum
AIPMT 2002
5

In protozoa like Amoeba and Paramecium, the organ for osmoregulation is

  1. contractile vacuole
  2. mitochondria
  3. nucleus
  4. food vacuole.
AIPMT 2002
6

Organisms which obtain energy by the oxidation of reduced inorganic compounds are called

  1. photoautotrophs
  2. chemoautotrophs
  3. saprozoic
  4. coproheterotrophs
AIPMT 2002
7

Cauliflower mosaic virus contains

  1. ss RNA
  2. ds RNA
  3. ds DNA
  4. ss DNA
AIPMT 2001
8

What is true for cyanobacteria?

  1. Oxygenic with nitrogenase
  2. Oxygenic without nitrogenase
  3. Non-oxygenic with nitrogenase
  4. Non-oxygenic without nitrogenase
AIPMT 2001
9

What is true for archaebacteria?

  1. All halophiles
  2. All photosynthetics
  3. All fossils
  4. Oldest living beings
AIPMT 2001
10

Adhesive pad of fungi penetrates the host with the help of

  1. mechanical pressure and enzymes
  2. hooks and suckers
  3. softening by enzymes
  4. only by mechanical pressure
AIPMT 2001
11

What is true for photolithotrophs?

  1. Obtain energy from radiations and hydrogen from organic compounds
  2. Obtain energy from radiations and hydrogen from inorganic compounds
  3. Obtain energy from organic compounds
  4. Obtain energy from inorganic compounds
AIPMT 2001

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)