Multiple Choice Questions & Answers on APSC Zoology Optional | GkSeries

31 Ductus caroticus is present in the arterial system of
1 toad
2 snake
3 calotes
4 crocodile

Answer: calotes
32 An aperture called foramen of panizzae' is present in
1 middle ear of reptile
2 cranium of reptile
3 heart of crocodile
4 heart of rabbit

Answer: heart of crocodile
33 Eutherians are characterized by
1 hairy skin
2 presence of teats
3 ovoviviparity
4 true placentation

Answer: true placentation
34 Crossing-over takes place in which stage of meiosis-I?
1 Leptotene
2 Zygotene
3 Pachytene
4 Diplotene

Answer: Pachytene
35 Ecological pyramids were given by
1 Tansley
2 Elton
3 Odum
4 Haeckel

Answer: Elton
36 The 10% energy transfer law in food chain was first given by
1 Lindeman
2 Tansley
3 Elton
4 Rawkiaer

Answer: Lindeman
37 Eutrophication is
1 excess oxygen in ponds
2 abundant fertilizers in lakes
3 lack of algae in lakes
4 abundant nektons in lakes

Answer: abundant fertilizers in lakes
38 Cellulose in rabbit is digested in
1 stomach
2 rumen
3 buccal cavity
4 caecum

Answer: caecum
39 The terminal electron receptor in aerobic respiration is
1 C02
2 02
3 H2
4 NADH

Answer: 02
40 Which step of translation does not consume a high-energy phosphate bond?
1 Translocation
2 Amino acid activation
3 Peptidyl transferase reaction
4 Aminoacyl t-RNA binding to A-site

Answer: Aminoacyl t-RNA binding to A-site
41 Anterior abdominal vein in frog is formed by union of
1 right and left pelvic veins
2 right and left sciatic veins
3 right and left femoral veins
4 right and left dorsolumber veins

Answer: right and left pelvic veins
42 Km value of an enzyme is the substrate concentration at which the reaction attains
1 2 Vmax
2 \ Vmax
3 4 Vmax
4 i fmax

Answer: \ Vmax
43 The fats absorbed from the gut are transferred to blood in the form of
1 chylomicron
2 micelles
3 chemomicrons
4 liposomes

Answer: chylomicron
44 'Bundle of His is a group of
1 ganglia
2 nerve fibres
3 muscle fibres
4 connective tissues

Answer: muscle fibres
45 Myxedema and Graves' disease are due to improper functioning of
1 pituitary
2 adrenal cortex
3 thyroid
4 thymus

Answer: thyroid