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NEET Zoology PYQs
Class XI & Class XII
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🧬 Zoology
📘 Class XI & XII
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407 questions in Zoology
Hormones stored and released from neurohypophysis
are:
A
Thyroid stimulating hormone and Oxytocin
B
Oxytocin and Vasopressin
C
Follicle stimulating hormone and Leutinizing hormone
D
Prolactin and Vasopressin
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Match the following columns and select the
correct option.
Column-I
Column-II
(A)Pituitary gland
(I)Grave's disease
(B)Thyroid gland
(II)Diabetes mellitus
(C)Adrenal gland
(III)Diabetes insipidus
(D)Pancreas
(IV)Addison's disease
A
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
B
(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
C
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
D
(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
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Select the correct statement.
A
Glucocorticoids stimulate gluconeogenesis.
B
Glucagon is associated with hypoglycemia.
C
Insulin acts on pancreatic cells and
adipocytes.
D
Insulin is associated with hyperglycemia.
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Vegetative propagule in Agave is termed as:
A
Rhizome
B
Bulbil
C
Offset
D
Eye
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Strobili or cones are found in:
A
Salvinia
B
Pteris
C
Marchantia
D
Equisetum
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Match the following columns and select the
correct option.
Column-I
Column-II
(A)Placenta
(I)Androgens
(B)Zona pellucida
(II)Human Chorionic Gonadotropin (hCG)
(C)Bulbo-urethral glands
(III)Layer of the ovum
(D)Leydig cells
(IV)Lubrication of the Penis
A
(A)-(IV), (B)-(III), (C)-(I), (D)-II)
B
(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
C
(A)-(III), (B)-(II), (C)-(IV), (D)-(I)
D
(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
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Which of the following hormone levels will cause
release of ovum (ovulation) from the graffian
follicle?
A
High concentration of Estrogen
B
High concentration of Progesterone
C
Low concentration of LH
D
Low concentration of FSH
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Meiotic division of the secondary oocyte is
completed:
A
Prior to ovulation
B
At the time of copulation
C
After zygote formation
D
At the time of fusion of a sperm with an ovum
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Explanation: The secondary oocyte is arrested in metaphase II and completes meiosis II only after fertilization. When a sperm fuses with the ovum, the oocyte finishes meiosis II, forming the mature ovum and a second polar body. Hence, the meiotic division is completed at the time of fusion of a sperm with an ovum (option 4).
🧠Did You Know? Fertilization triggers the last meiotic division, ensuring the haploid number is restored in the zygote.
💡 NCERT Memory Line: The secondary oocyte completes meiosis II only upon fertilization, forming the mature ovum.
Select the correct option of haploid cells from the
following groups:
A
Primary oocyte, Secondary oocyte, Spermatid
B
Secondary spermatocyte, First polar body, Ovum
C
Spermatogonia, Primary spermatocyte, Spermatid
D
Primary spermatocyte, Secondary spermatocyte,
Second polar body
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Match the following columns and select the correct option:
Column-I
Column-II
(A)Ovary
(I)Human chorionic Gonadotropin
(B)Placenta
(II)Estrogen & Progesterone
(C)Corpus luteum
(III)Androgens
(D)Leydig cells
(IV)Progesterone only
A
(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
B
(A)-(I), (B)-(II), (C)-(III), (D)-(IV)
C
(A)-(i), (B)-(III), (C)-(II), (D)-(IV)
D
(A)-(II), (B)-(I), (C)-(IV), (D)-(iii)
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