Which of the following is not a characteristic of pBR322 vector
It is the first artificial cloning vector constructed in 1977 by Boliver and Rodriguez.
It is the most widely used, versatile and easily manipulated vector.
It has two antibiotic resistance genes, tetr and ampr.
It does not have restriction site for Sal I.
D.
It does not have restriction site for Sal I.
pBR322 has a restriction site for Sal I
Assertion: One codon may code for more than one amino acid.
Reason: A codon is degenerate and ambiguous.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
What is true about Bt toxin
Bt protein exists as active toxin in the Bacillus.
The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication.
The concerned Bacillus has antitoxins.
The inactive protoxin gets converted into active form in the insect gut
Assertion: In a pedigree analysis, <5> represents five unaffected offsprings.
Reason: In a pedigree analysis, the offsprings are numbered with arabic numerals (1, 2, 3 .....) and a generation is numbered with roman numerals (I, II, III...).
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: GM crops can affect human health by causing allergic reactions.
Reason: Transgenes in commercial crops can endanger native species e.g., the Bt toxin gene expressed in pollen might endanger pollinators like honeybees.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Secondary air pollutants are formed by interaction among the primary pollutants and are more toxic.
Reason: DDT is a secondary air pollutant.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Interspecific competition is the only potent force in organic evolution.
Reason: Unexceptionally two closely related species competing for the same resources cannot co-exist indefinitely
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: AIDS and hepatitis B are sexually transmitted diseases.
Reason: There is no permanent cure for both of them
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Wine and beer are produced directly by fermentation whereas brandy and whisky require both fermentation and distillation. This is because
fermentation is inhibited at an alcohol level of 10-18%
distillation prolongs storage
distillation improves quality
distillation purifies the beverage.
Which one of the following immune system components does not correctly match with its respective role
Interferons - secreted by virus-infected cells and protect non-infected cells from further viral infection
B-lymphocytes-produces antibodies in response to pathogens into blood to fight with them
Macrophages-mucus secreting cells that trap microbes entering in the body
IgA-present in colostrum in early days of lactation and protect infant from diseases
