Biology Questions: Paper - 5

Biology Model Question Paper - 5

1.

When a fresh water protozoan is placed in marine water________.
(A) the contractile vacuole disappears
(B) the contractile vacuole increases in size
(C) a number of contractile vacuoles appear
(D) the contractile vacuole remains unchanged

Answer:  (A)

2.

A dorsal horn is present on the ________ of mulberry silk worm (caterpillar).
(A) 8^th abdominal segment
(B) 5^th abdominal segment
(C) 2^nd thoracic segment
(D) Head

Answer: (A)

3.

A balanced diet does NOT include ________.
(A) Carbohydrates and fats
(B) Nucleic acids and enzymes
(C) Proteins and vitamins
(D) Minerals and salts

Answer:  (B)

4.

To meet the demands of the society, in vitro production of a large number of plantlets in a short duration is practiced in floriculture and horticulture industry today. This is called _______.
(A) Soma clonal variation
(B) Hybridoma technology
(C) Micropropagation
(D) Somatic hybridization

Answer: (C)

5.

The term genetic RNA refers to
(A) the RNA that carries genetic message
(B) the RNA that helps gene regulation in lac-operon
(C) the RNA present in mitochondria
(D) none of the above

Answer:  (A)

6.

When 2 to 3 drops of Benedicts reagent are added to a urine sample and heated gently, it turns yellow. This colour change indicates that ________.
(A) Urine contains 1.5% glucose
(B) Urine contains 2% glucose
(C) Urine contains 0.5^th  glucose
(D) Urine contains 1% glucose

Answer:  (D)

7.

What will be the codons in m-RNA if the DNA codes are ATG-CAG?
(A) TAC – GTC
(B) UAC – GUC
(C) UCA – TUA
(D) TCA – GTC

Answer: (B)

8.

What is/are true about heart wood?
A. It does not help in water conduction.
B. It is also called alburnum.
C. It is dark in colour but very soft.
D. It has tracheary elements which are filled with tannin, resin, etc.
(A) A and D
(B) B and D
(C) A, B and C
(D) B. C and D

Answer: (A)

9.

What is a genophore?
(A) DNA in prokaryotes
(B) DNA and RNA in prokaryotes
(C) DNA and protein in prokaryotes
(D) RNA in prokaryotes

Answer: (B)

10.

Vitellogenesis occurs during the formation of
(A) Oogonial cell in the Graafian follicle
(B) Ootid in the fallopian tube
(C) Secondary Oocyte in the fallopian tube
(D) Primary oocyte in the Graafian follicle

Answer: (D)

11.

Tyloses are found in _______.
(A) secondary xylem
(B) secondary phloem
(C) sclerenchyma fibres
(D) sclereids

Answer: (A)

12.

Transpiration facilitates
(A) Opening of stomata
(B) Absorption of water by roots
(C) Excretion of minerals
(D) Electrolyte balance

Answer: (B)

13.

The World Intellectual Property Day is observed on ________.
(A) February, 29t^th
(B) June, 30^th
(C) April, 26^th
(D) September, 5^th

Answer:  (C)

14.

The types of ribosomes found in prokaryotic cell are ________.
(A) 100 S
(B) 80 S
(C) 60 S
(D) 70 S

Answer:  (D)

15.

The term, ‘southern blotting’ refers to
(A) transfer of DNA fragments from invitro cellulose membrane to electrophoresis gel
(B) attachment of probes to DNA fragments
(C) transfer of DNA fragments from electrophoresis gel to nitrocellulose sheet.
(D) comparison of DNA fragments from two sources

Answer:  (C)