Start learning →

JKCET Genetic Material — practice questions

Explore 4 free Genetic Material questions in JKCET Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Genetic Material with Quill →

Genetic Material questions and exercises with answers

Showing questions 1–4 of 4.

Griffith's 1928 transformation experiments used the bacterium:Read the answer and worked solution →The **Hershey-Chase** experiment (1952) used:Read the answer and worked solution →In Griffith's transformation experiment, the 'transforming principle' was later identified by Avery, MacLeod and McCarty (1944) as:Read the answer and worked solution →Spot the trait Mendel never usedRead the answer and worked solution →

Worked practice questions

Griffith's 1928 transformation experiments used the bacterium:

  1. Escherichia coli
  2. Streptococcus pneumoniae
  3. Bacillus subtilis
  4. Mycobacterium tuberculosis
Show answer and solution

Correct answer: B. Streptococcus pneumoniae

Griffith worked with *Streptococcus pneumoniae* (S = smooth/virulent, R = rough/non-virulent strains). Heat-killed S mixed with live R turned R into deadly S — the 'transforming principle' (later shown by Avery et al. to be DNA).

Open this question →

The **Hershey-Chase** experiment (1952) used:

  1. Mice and pneumonia bacteria
  2. Bacteriophages with radioactive ³²P (DNA) and ³⁵S (protein)
  3. Drosophila melanogaster
  4. Garden pea plants
Show answer and solution

Correct answer: B. Bacteriophages with radioactive ³²P (DNA) and ³⁵S (protein)

Hershey and Chase used bacteriophages labelled with ³²P (DNA) or ³⁵S (protein coat) to infect *E. coli*. Only ³²P entered the cells — proving DNA, not protein, is the genetic material.

Open this question →

In Griffith's transformation experiment, the 'transforming principle' was later identified by Avery, MacLeod and McCarty (1944) as:

  1. Protein
  2. RNA
  3. DNA
  4. Lipopolysaccharide
Show answer and solution

Correct answer: C. DNA

Avery et al. selectively destroyed proteins (proteases), RNA (RNase) and DNA (DNase) in cell-free extracts of S strain. Only DNase eliminated the transformation — pinpointing DNA as the transforming principle.

Open this question →

How to practise

  1. Choose a Genetic Material question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Biology topics

Molecular Basis of InheritanceSexual Reproduction in Flowering PlantsHuman ReproductionCell Cycle and Cell DivisionPrinciples of Inheritance and VariationPrinciples Of InheritanceReproductive HealthHuman Health and Disease