STD 12 - 4. principal of inheritance and variation — NEET STD 11 Science — Question

Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus) ?

Which one of the following statements are correct ?
(i) Entamoeba histolytica is a protozoan parasite in large intestine of human which causes amoebiasis (amoebic dysentery) and fruitflies act as mechanical carriers for spread of this disease.
(ii) Wuchereria bancrofti and W.malayi causes elephantiasis or filariasis.
(iii) Many fungi belong to genera Microsporum, Trichophyton and Epidermophyton are responsible for ringworms. heat and moisture conditions help these fungi to grow in groin or between toes.
(iv) Fishes like Gambusia feed on the mosquito larvae in ponds.
(v) The overall ability of host to fight the disease is called immunity.
(vi) In cellular barriers of acquired immunity, certain types of WBC of our body like polymorpho-nuclear leukocyte and monocytes and natural killer in body as well as macrophages in tissue can phagocytose and destroy microbe.
(vii) The response produce by body when it encounter pathogen for the first time is called secondary response.
(viii) The secondary response due to encounter with same pathogen is called anamnestic.
(ix) Two types of lymphocyte present in our body are B-and T-lymphocyte.
(x) T-lymphocyte produces army of protein in response to pathogen called antibodies.
(xi) Each antibody molecule has 2 peptide chains.
(xii) Antibody molecule has 2 light chains and 2 heavy chains and hence antibody is represented as H.L.
(xiii) The immune response mediated by B-lymphocyte is called humoral immune response and by T-lymphocyte is called cell- mediated response.
Choose the correct option given below :-

In heterozygous condition, the individual expression of both the alleles in the phenotype is exemplified by

Which one of the following substances is actively secreted into the glomerular filtrate of the kidney tubule

Statement I: Myelinated nerve fibres are found in spinal and cranial narves.
Statement II: Unmyelinated nerve fibres are found in autonomous & somatic neural systems.

Beta and alpha cells secrete the following hormones in respective order

Biogas is pathogen free because

Common symptoms of allergy are

Find out the correct statement.