Home
Class 12
BIOLOGY
Read the following statements and choose...

Read the following statements and choose the option with incorrect statements. (a) Restriction enzymes are obtained from prokaryotes. (b) Restriction endonucleases cut DNA strands by breaking hydrogen bonds at specific points. (c) More than 230 restriction enzymes have been isolated from more than 900 strains of bacteria. (d) Each restriction enzyme recognizes a specific palindromic nucleotide sequence in DNA.

A

(a) and (b)

B

(b) and (c)

C

(c) and (d)

D

(a) and (d)

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MOCK TEST 39

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|22 Videos

  • MOCK TEST 4

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|35 Videos

Similar Questions

Explore conceptually related problems

More than 900 restriction enzymes have been isolated from

Approximately how many restriction enzymes have been isolated from the different (over 230) strains of bacteria:

Approximately how many restriction enzymes have been isolated from the different (over 230) strains of bacteria:

How many restriction endonuclease enzymes have been isolated till date from various bacteria?

Select the correct option regarding restriction endonuclease P. 900 restriction enzyme have been isolated from over 200 strains. Q. The first restriction exonuclease was Hind II. R. Each restriction endonuclease recognises same palindromic sequence .

Read the following statements and choose the option which includes all incorrect statements. (a) Inulin is a fructosan polysaccharide (b) Backbone of DNA helices is made of hydrogen bonds between nitrogenous bases (c) Enzyme that catalyses the removal of groups from substrates by the mechanism which leaves double bonds in products is a hydrolase (d) Insulin is a proteinaceous hormone

Read the given statements and select the correct option, Statement 1 : Restriction endonuclease enzymes recognise a specific palindromic nucleotide sequence in the DNA Statement 2: Restriction endonuclease enzymes are called as molecular scissors or biological scissors.

Assertion: Restriction endonucleases produces overhanging stretches called sticky ends on each DNA strand Reason :Restriction enzymes cut the strand of DNA a little away from the centre of pallindrome sites

Which of the following statements does not hold true for restriction enzyme? (a) It recongnises a palindromic nucleotide sequence (b) It is an endonuclease. (c) It is isolated from viruses (d) It produces the same kind of sticky ends in different DNA molecules

Read the following statements and select the correct ones. (i) Same kind of sticky ends are produced when a DNA has been cut by different restriction enzymes. (ii) Exonucleases make cuts at specific positions within the DNA. (iii) Hind ll was the first restriction endonuclease to be isolated. (iv) A bacteriophage has the ability to replicate within bacterial cells by integrating its DNA with bacterial DNA. (v) Presence of more than one recognition sites for a enzyme within the vector facilitates the gene cloning.