STD 11 - 17. Locomotion and movement — NEET STD 11 Science — Question

‘Amoebiasis' (amoebic dysentery) is caused by

Vasa efferentia are the ductules leading from

Which of the following statements are correct ?
(A) The lymphoid tissue located within the lining of major tracts in body is called mucosa associated lymphoid tissue (MALT) and constitute 40% of lymphoid tissue in human body.
(B) AIDS stands for Acquired Immuno Deficiency Syndrome and it was first reported in 1971 (year).
(C) AIDS is caused by HIV, a member of a group of viruses called retrovirus that has DNA genome.
(D) The incubation period for AIDS is 5 - 10 years.
(E) Once HIV gets inside body, virus enters macrophage where RNA genome replicates to form viral DNA with help of enzyme reverse transcriptase.
(F) Macrophage in our body act as HIV factory.
(G) HIV attacks killer T-lymphocyte.
(H) A widely used diagnostic test for AIDS is ELISA.
(I) NACO stands for National AIDS Control Organization.
(J) Normal cell shows a property of contact inhibition by virtue of which contact with other cells inhibit their uncontrolled growth.
(K) Malignant tumors normally remain confined to original location and causes little damage.
(L) Malignant tumors are mass of proliferating cells called neoplastic or tumor cells.
(M) The metastatis is property of benign tumors by which it reach different sites of the body.
Choose the correct option given below :-

Assertion: In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.
Reason: The globular head of actin is an active ATPase enzyme and has binding sites for ATP and active sites for myosin.

Statement I: Sting ray is a member of Chondrichthyes.
Statement II: They have three pairs of gills which are covered by an operculum on each side.

Which of the following is an incorrect statement for periodic abstinence?

The sympathetic and parasympathetic neural system combines from

Excretory organ found in earthworm and other annelids is