Assertion : Histamine is involved in allergic and inflammatory reactions.
Reason : Histamine is a vasodilator.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
Assertion : The number of cells in a multicellular organism is inversely proportional to the size of body.
Reason : All the cells in the biological world are of same size.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
Assertion : Systematics is the branch of biology that deals with classification of living organism.
Reason : The aim of classification is to group the organisms in an orderly manner.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
Assertion : The collenchyma is a thick walled living tissue.
Reason : The collenchyma is thickened due to the deposition of pectin.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both the assertion and reason are false.
Assertion : When six molecules ofcarbon dioxide participate in photosynthesis, 12 molecules of NADP and 18 ATP are used up, forming one hexose molecule.
Reason : The photosynthetic light reaction results in the formation of ATP and NADPH.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both the assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both the assertion and reason are false.
Which of the following is a component of cell mediated immunity?
B-cells
- cells
T-cells
Both (a) and (c)
C.
T-cells
Cell- mediated immunity is an immune response that does not involve antibodies, but rather involves the activation of phagocytes, antigen- specific cytotoxic T- lymphocytes and the release of various cytokines in response to an antigen. CD4 cell or Helper T cells provide protection against different pathogens.
Cyclosporine is used as
clot buster
immunosupppressant
prophylactic for viruses
prophylactic for marasmus
A point mutation comprising the substitution of a purine by pyrimidine is called
transition
translocation
deletion
transversion
Frameshift mutation occurs when
base is subsituted
base is deleted or added
anticodons are absent
none of these