MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Griffith's Experiment

In Griffith’s...

Question

In Griffith’s transformation experiment, the conversion of R strain to S strain was due to:

A

Transfer of transforming principle from live R strain to heat-killed S strain bacteria

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Uptake of naked DNA from medium by heat-killed S strains

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Transfer of transforming principle from heat-killed S strains to live R strains

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

Uptake of transforming principle from medium by heat-killed S strains to become live S strains.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Transfer of transforming principle from heat-killed S strains to live R strains
The transforming principle, later identified as DNA, passed on from the heat-killed S strains, enabled the R strains to synthesise a smooth polysaccharide capsule and become virulent.

Suggest Corrections

thumbs-up

2

Similar questions

Q. Assertion :In Griffiths experiment, a mixture of heat-killed virulent bacteria R and live non-virulent bacteria 5, lead to the death of mice. Reason: Transforming principle got transferred from heat-killed R strain to S strain and made it virulent.

Q. To describe transforming principle, Frederick Griffith performed series of experiments by selecting two strains of Streptococcus pneumoniae namely S-strain (virulent) and R-strain (non-virulent).
Which of the following steps does not describe this experiment?
[0.7 mark]

Q. In Griffith’s transformation experiment, the conversion of R strain to S strain was due to:

Q. In Griffith experiments, what happened when heat-killed S strains pneumococci were injected into a mouse along with live R strains pneumococci ?

Q. Avery, MacLeod and Mc. Carty used the S(virulent) and R(avirulent) strains of D.pneumococci. They isolated and purified proteins, DNA, RNA, carbohydrates and lipids from the S strain. They treated the living avirulent R strain with each of these chemicals and Identify the transforming principle (DNA).
R-type + Protein S-type

\to

A-type
R-type + Carbohydrate S-type

\to

B-type
R-type + DNA of S-type + DNAase

\to

C-type
R-type + DNA of S-type

\to

D-type
Identify the type of bacteria(A to D)

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

DNA As Genetic Material

BIOLOGY

Watch in App

explore_more_icon

Explore more

Griffith's Experiment

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon