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Earn 100

There are 5 test tubes having a culture medium containing rough colonies of Streptococcus pneumoniae. The following substances were added to them. Which of these test tubes will show smooth colonies of Streptococcus pneumoniae on incubation for some time?

Test tube I: RNA from a heat-killed smooth strain of Streptococcus pneumoniae

Test tube II: DNA from a heat-killed smooth strain of Streptococcus pneumoniae

Test tube III: Protein from a heat-killed smooth strain of Streptococcus pneumoniae

Test tube IV: Carbohydrate from a heat-killed smooth strain of Streptococcus pneumoniae

Test tube V: Heat killed smooth strain of Streptococcus pneumoniae incubated with DNAse enzyme

13.58% studentsanswered this correctly

Important Questions on Origin and the Evolution of Life

EASY
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IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 311
DNA replication is a _____ process.
EASY
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IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 312
The bond formed between phosphate and pentose sugars of DNA is
EASY
MHT-CET
IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 313
In the Avery, MacLoed, and McCarty experiment, which of the following enzyme did not affect the process of transformation?
MEDIUM
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Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 314

A cross between two tall garden pea plants produced all tall plants. The possible genotypes of the parents are shown below.

 I)TT,TT  II)TT,Tt  III)Tt,tt  IV)Tt,Tt 

The correct answer is:

MEDIUM
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IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 315
Select the chromosomal disorders from the following diseases affecting humans

I. Haemophilia

II. Down's syndrome

III. Klinefelter's syndrome

IV. Sickle cell anemia

V. Turner's syndrome

VI. Thalessemia
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Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 317
Colour-blindness occurs in
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IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 319
Both sickle cell anaemia and Huntingtion's chorea are
MEDIUM
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IMPORTANT
Biology Crash Course MHT-CET>Chapter 13 - Origin and the Evolution of Life>Exercise 1>Q 320
A patient suffering from Down's syndrome was carefully examined. There were three 21 chromosomes in the patient. The sequence of all the genes and alleles present on two of the three 21st chromosomes were an exact match with the patient's mother while the third one was an exact match with the patient's father. Which of the following process was faulty to have produced this individual?