Hormones secreted by the placenta to maintain pregnancy are
a.
hCG, hPL, progestogens, prolactin
b.
hCG, hPL, estrogens, relaxin, oxytocin
c.
hCG, hPL, progestogens, estrogens
Correct Answer
d.
hCG, progestogens, estrogens, glucocorticoids
Step-by-Step AI Explanation
Verified Method
The placenta secretes hCG, hPL, estrogens and progestogens to maintain pregnancy.
Q47mcq
The contraceptive 'SAHELI'
a.
blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
b.
increases the concentration of estrogen and prevents ovulation in females.
c.
is an IUD.
d.
is a post-coital contraceptive.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Saheli (centchroman/ormeloxifene) is a non-steroidal oral contraceptive, used weekly. It is not an IUD; it acts as an anti-estrogen and is not a post-coital method.
Q48mcq
The difference between spermiogenesis and spermiation is
a.
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
b.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
c.
In spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
d.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Spermiogenesis is the transformation of spermatids into spermatozoa. Spermiation is the release of spermatozoa from Sertoli cells into the lumen of seminiferous tubules.
Q49mcq
The amnion of mammalian embryo is derived from
a.
ectoderm and mesoderm
Correct Answer
b.
endoderm and mesoderm
c.
mesoderm and trophoblast
d.
ectoderm and endoderm
Step-by-Step AI Explanation
Verified Method
The amnion is formed from extraembryonic ectoderm and mesoderm.
Q50mcq
In a growing population of a country,
a.
pre-reproductive individuals are more than the reproductive individuals.
Correct Answer
b.
reproductive individuals are less than the post-reproductive individuals.
c.
reproductive and pre-reproductive individuals are equal in number.
d.
pre-reproductive individuals are less than the reproductive individuals.
Step-by-Step AI Explanation
Verified Method
A growing population has an expanding age pyramid, with the pre-reproductive group larger than the reproductive group.
Q51mcq
All of the following are included in ex-situ conservation except
a.
Wildlife safari parks
b.
Sacred groves
Correct Answer
c.
Botanical gardens
d.
Seed banks
Step-by-Step AI Explanation
Verified Method
Sacred groves are an example of in-situ conservation; wildlife safari parks, botanical gardens and seed banks are ex-situ methods.
Q52mcq
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
a.
Commensalism
b.
Mutualism
c.
Parasitism
d.
Amensalism
Correct Answer
Step-by-Step AI Explanation
Verified Method
Amensalism is exploited in antibiotic production, where one microorganism inhibits another without being affected, e.g. Penicillium producing penicillin.
Q53mcq
Which part of poppy plant is used to obtain the drug 'Smack'?
a.
Flowers
b.
Latex
Correct Answer
c.
Roots
d.
Leaves
Step-by-Step AI Explanation
Verified Method
Smack is heroin, derived from morphine obtained from the latex of the opium poppy.
Q54mcq
Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Eutrophication, b. Sanitary landfill, c. Snow blindness, d. Jhum cultivation
Column II: i. UV-B radiation, ii. Deforestation, iii. Nutrient enrichment, iv. Waste disposal
Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Fibrinogen, b. Globulin, c. Albumin
Column II: i. Osmotic balance, ii. Blood clotting, iii. Defence mechanism
a.
iii ii i
b.
i ii iii
c.
i iii ii
d.
ii iii i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Fibrinogen, b. Globulin, c. Albumin
Column II: i. Osmotic balance, ii. Blood clotting, iii. Defence mechanism
a.
a-iii, b-ii, c-i
b.
a-i, b-ii, c-iii
c.
a-i, b-iii, c-ii
d.
a-ii, b-iii, c-i
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Which of the following characteristics represent inheritance of blood groups in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
a.
b, c and e
b.
a, b and c
c.
b, d and e
d.
a, c and e
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Glycosuria, b. Gout, c. Renal calculi, d. Glomerular nephritis
Column II: i. Accumulation of uric acid in joints, ii. Mass of crystallised salts within the kidney, iii. Inflammation in glomeruli, iv. Presence of glucose in urine
a.
a-iii, b-ii, c-iv, d-i
b.
a-i, b-ii, c-iii, d-iv
c.
a-ii, b-iii, c-i, d-iv
d.
a-iv, b-i, c-ii, d-iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function): a. Ultrafiltration, b. Concentration of urine, c. Transport of urine, d. Storage of urine
Column II (Part of Excretory System): i. Henle's loop, ii. Ureter, iii. Urinary bladder, iv. Malpighian corpuscle, v. Proximal convoluted tubule
a.
a-iv, b-v, c-ii, d-iii
b.
a-iv, b-i, c-ii, d-iii
c.
a-v, b-iv, c-i, d-ii
d.
a-v, b-iv, c-i, d-iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function)
a. Ultrafiltration
b. Concentration of urine
c. Transport of urine
d. Storage of urine
Column II (Part of Excretory System)
i. Henle’s loop
ii. Ureter
iii. Urinary bladder
iv. Malpighian corpuscle
v. Proximal convoluted tubule
a.
iv v ii iii
b.
iv i ii iii
c.
v iv i ii
d.
v iv i iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Proliferative Phase
b. Secretory Phase
c. Menstruation
Column II
i. Breakdown of endometrial lining
ii. Follicular Phase
iii. Luteal Phase
a.
iii ii i
b.
i iii ii
c.
ii iii i
d.
iii i ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
a.
iii i ii
b.
i iii ii
c.
i ii iii
d.
ii i iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
a.
a-iii, b-i, c-ii
b.
a-i, b-iii, c-ii
c.
a-i, b-ii, c-iii
d.
a-ii, b-i, c-iii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory reserve volume
c. Expiratory reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
a.
a-iii, b-ii, c-i, d-iv
b.
a-iii, b-i, c-iv, d-ii
c.
a-i, b-iv, c-ii, d-iii
d.
a-iv, b-iii, c-ii, d-i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Herbarium
b. Key
c. Museum
d. Catalogue
Column II
i. A place having a collection of preserved plants and animals
ii. A list that enumerates methodically all the species found in an area with brief description aiding identification
iii. A place where dried and pressed plant specimens mounted on sheets are kept
iv. A booklet containing a list of characters and their alternates helpful in identification of various taxa
a.
a-iii, b-iv, c-i, d-ii
b.
a-i, b-ii, c-iii, d-iv
c.
a-ii, b-iv, c-iii, d-i
d.
a-iii, b-ii, c-i, d-iv
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
a.
Hydrilla
b.
Yucca
c.
Banana
d.
Viola
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
a.
Hydrilla
b.
Yucca
c.
Banana
d.
Viola
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