MCQ
Striated muscles contract by
- ✓Sliding of actin filament upon myosin filaments
- BSliding of myosin filaments upon actin filaments
- CPulling together of myosin filaments
- DPulling together of actin filaments
✓
Answer
Correct option: A.
Sliding of actin filament upon myosin filaments
a
It’s obvious.
It’s obvious.
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Which statement is correct for glomerular filtration rate (GFR)?
(i) The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR).
(ii) GFR in a healthy individual is approximately 125 ml/minute, i.e., 280 litres per day.
(iii) Glomerular filtration rate regulated by juxtaglomerular apparatus (JGA).
(iv) JGA is formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact.
(v) A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal.
(vi) Rennin which converts angiotensinogen in blood to angiotensin II and further to angiotensin I, which is a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
(i) The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR).
(ii) GFR in a healthy individual is approximately 125 ml/minute, i.e., 280 litres per day.
(iii) Glomerular filtration rate regulated by juxtaglomerular apparatus (JGA).
(iv) JGA is formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact.
(v) A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal.
(vi) Rennin which converts angiotensinogen in blood to angiotensin II and further to angiotensin I, which is a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
The intercellular material of the given figure is solid and resists compression. Identify the figure and the label marked as $A \& B$.
→Which one of the following statements are incorrect ?
(A) Cnidarians exhibit two basic body forms called medusa (sessile and cylindrical form) and polyp (free-swimming and umbrella shaped).
(B) The phenomenon exhibited by some Cinidarians in which both forms exhibit alternation of generation is termed as metastasis.
(C) Polyps produce medusae by sexually and meduase forms polyp by asexually reproduction.
(D) Physalia is known as Portuguese man-of-war; Adamsia as Sea anemone; Pennatula as Sea pen; Gorgonia as Sea fan and Meandrina as Brain coral.
(E) Ctenophores are commonly known as seawalnuts or comb jellies.
(F) Ctenophores are exclusively marine and body bears eight external rows of ciliated comb plates that help in locomotion.
(G) Bioluminescence is the property of living organism to emit light and is well marked by ctenophores.
(H) Reproduction in ctenophore takes place by sexual means. Fertilisation is external with indirect development.
(I) Hooks and Sucker are present in parasitic form of members of Aschelminthes.
(J) Specialized cells called flame cells help in osmoregulation and excretion in platyhelminthes.
(K) In platyhelminthes, fertilization is internal with direct development.
(L) Some members of platyhelminthes like planaria possess high regeneration capacity.
(M) Taenia, a member of phylum platyhelminthes is commonly called tapeworm and fasciola is commonly called as liver fluke.
(N) The alimentary canal in members of aschelminthes is complete with a well- developed muscular pharynx.
(0) The males are longer than females in members of aschelminthes.
(P) The members of aschelminthes are dioecious as sexes are separate. Fertilisation is internal and development is indirect.
(Q) Ascaris, a member of phylum aschelminthes are commonly known as round worms; Wuchereria as filarial worm and Ancyclostoma as hookworms.
Choose the correct option given below :-
(A) Cnidarians exhibit two basic body forms called medusa (sessile and cylindrical form) and polyp (free-swimming and umbrella shaped).
(B) The phenomenon exhibited by some Cinidarians in which both forms exhibit alternation of generation is termed as metastasis.
(C) Polyps produce medusae by sexually and meduase forms polyp by asexually reproduction.
(D) Physalia is known as Portuguese man-of-war; Adamsia as Sea anemone; Pennatula as Sea pen; Gorgonia as Sea fan and Meandrina as Brain coral.
(E) Ctenophores are commonly known as seawalnuts or comb jellies.
(F) Ctenophores are exclusively marine and body bears eight external rows of ciliated comb plates that help in locomotion.
(G) Bioluminescence is the property of living organism to emit light and is well marked by ctenophores.
(H) Reproduction in ctenophore takes place by sexual means. Fertilisation is external with indirect development.
(I) Hooks and Sucker are present in parasitic form of members of Aschelminthes.
(J) Specialized cells called flame cells help in osmoregulation and excretion in platyhelminthes.
(K) In platyhelminthes, fertilization is internal with direct development.
(L) Some members of platyhelminthes like planaria possess high regeneration capacity.
(M) Taenia, a member of phylum platyhelminthes is commonly called tapeworm and fasciola is commonly called as liver fluke.
(N) The alimentary canal in members of aschelminthes is complete with a well- developed muscular pharynx.
(0) The males are longer than females in members of aschelminthes.
(P) The members of aschelminthes are dioecious as sexes are separate. Fertilisation is internal and development is indirect.
(Q) Ascaris, a member of phylum aschelminthes are commonly known as round worms; Wuchereria as filarial worm and Ancyclostoma as hookworms.
Choose the correct option given below :-
Match the scientists listed under column 'l' with ideas listed column 'II'
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| A. Darwin | i. Origin of life through chemical evolution |
| B. Oparin | ii. Use and disuse of organs |
| C. Lamarck | iii. Mutation theory |
| D. Hugo devries | iv. Evolution by natural selection |
Which of the following parts of a neuron is covered by fatty sheath?
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Two pea plants were subjected for cross pollination. Of the $183$ plants produced in the next generation, $94$ plants were found to be tall and $89$ plants were found to be dwarf. The genotypes of the two parental plants are likely to be
→Which of the following are Autoimmune disorders?
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Choose the most appropriate answer from the options given below:
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