Biology Today — May 2017

(WallPaper) #1

New MCQs



  1. Select the option which correctly fills the given blanks.


(i) Fallopian tubes are attached to the ovaries through
_______.
(ii) _______ cells nourish the developing oocyte and
begin to secrete estrogens.
(iii) Corpus luteum is filled with _________ coloured
lutein pigment.
(iv) Ovarian stroma is covered by a layer of connective
tissue called _________.
(i) (ii) (iii) (iv)
(a) isthmus Follicular red cortex
(b) fimbriae Granulosa yellow tunica
albuginea
(c) fimbriae Follicular yellow visceral
peritoneum
(d) infundibulum Granulosa grey germinal
epithelium


  1. Match column I with column II and select the correct option.


Column I Column II


  1. Prolactin P. Secretion of estrogen

  2. Oxytocin Q. Milk production

  3. FSH R. Ovulation

  4. LH S. Milk ejection
    (a) 1 - S ; 2 - Q ; 3 - R ; 4 - P
    (b) 1 - Q ; 2 - P ; 3 - R ; 4 - S
    (c) 1 - S ; 2 - Q ; 3 - P ; 4 - R
    (d) 1 - Q ; 2 - S ; 3 - P ; 4 - R

  5. Read the given statements and select the correct option


Statement A : Genetic variations occur during oogenesis.


Statement B : Crossing over takes place during meiotic


division of primary oocyte.
(a) Both statements A and B are correct and B is the
correct explanation of A.
(b) Both statements A and B are correct but B is not the
correct explanation of A.
(c) Statement A is correct but statement B is incorrect.
(d) Statement A is incorrect but statement B is correct.


  1. Refer to the given figure and hints. Identify the correct phases


of menstrual cycle with their days.

A

C

B

Cycle begins here
I. During C, endometrium breaks down.
II. During A, FSH and estrogen secretion increases.
III. During B, progesterone is secreted.
(a) A - Menstrual phase, 1st - 3rd days
B - Follicular phase, 5th - 18th days
C - Luteal phase, 20th - 28th days
(b) A - Luteal phase, 10th - 18th days
B - Follicular phase, 20th - 28th days
C - Menstrual phase, 1st - 10th days
(c) A - Follicular phase, 6th - 13th days
B - Luteal phase, 15th - 28th days
C - Menstrual phase, 1st - 5th days
(d) A - Ovulatory phase, 1st - 5th days
B - Luteal phase, 6th - 10th days
C - Menstrual phase, 10th - 28th days


  1. Which of the following events results in the beginning of
    ovarian cycle?
    (a) Sudden decrease in level of progesterone
    (b) Increased level of estrogen
    (c) Increased secretion of FSH and LH from anterior pituitary
    (d) Increased secretion of GnRH from hypothalamus

  2. Which of the following consists of haploid number of
    chromosomes?
    (a) Oogonia (b) Primary oocyte
    (c) Secondary oocyte (d) None of these

  3. First polar body is formed after
    (a) mitosis (b) meiosis I
    (c) meiosis II (d) fertilisation.

  4. During oogenesis, oogonium produces
    (a) two functional eggs
    (b) two functional eggs and three polar bodies
    (c) one functional egg and three polar bodies
    (d) one functional egg and one polar body.

  5. Which one of the following is the widest and longest part of
    oviduct?
    (a) Infundibulum (b) Isthmus
    (c) Ampulla (d) Fimbriae

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