TEST YOUR KNOWLEDGE
SOUMENDRA NATH DAS
1. Which aquaƟc plant is called “NaƟonal Flower of India”?
a) Water hyacinth
b) Water lily
c) Lotus
d) Hydrilla
11. Plants that float freely in water are called:
a) Pleuston
b) Helophytes
c) IsoeƟds
d) Elodeids
2. Which of the following is the “NaƟonal Flower of
Bangladesh”?
a) Water spinach
b) Water hyacinth
c) Water lily
d) Amazon water lily
12. Which of the following plants is used in making handicraŌs?
a) Sola
b) Water lily
c) Lotus
d) Duck weed
13. Which is an aquaƟc fruit plant?
a) Foxnut
c) Lotus
3. Which is the smallest aquaƟc plant of the world?
a) Duckweeds
b) Water chestnut
c) Azolla
d) Watercress
14. Enhydra fluctuans is usually used as:
a) Flower
b) Animal feed
c) Vegetable
d) Manure
15. Cyperus corymbosus is commercially used for making:
a) CraŌ
b) Food
c) Mat
d) Green manure
4. Which is the largest aquaƟc plant of the world?
a) Water chestnut
b) Water lily
c) Lotus
d) Amazonwater lily
16. Which plant is commercially used for producƟon of bioferƟlizer?
a) Vallisneria
b) Azolla
c) Hydrilla
d) Water hyacinth
5. Which is the main characterisƟc of aquaƟc plants?
a) Parenchyma
b) Aerenchyma
c) Collenchyma
d) Scelerenchyma
17. Azolla mexicana is popularly known as:
a) Mosquito fern
b) Duckweed
c) Water soldier
d) Lizard’s tail
6. Which aquaƟc plant is used as poor man’s vegetable?
a) Water lily
b) Water hyacinth
c) Water chestnut
d) Water spinach
18. Marsilea minuta is usually used as:
a) Fruit
b) Flower
c) Vegetable
d) None of the above
7. Trapa bispinosa is popularly known as:
a) Water lily
b) Foxnut
c) Water chestnut
d) Duckweed
8. ‘Inflated PeƟole’ is present in:
a) Water Hyacinth
c) Azolla
19. Which aquaƟc plant is largely used in the aquarium?
a) Hydrilla ver cillata
b) Azolla pinnata
c) Salvinia natans
d) Wolffia arrhiza
b) Salvinia
d) Rice grass
20. Which of the following plants acts as a good oxygenator in
the fish pond?
a) Wolffia arrhiza
b) Sagi aria sagi folia
c) Ipomoea aqua ca
d) Lemna indica
9. Which of the following now has become a highly profitable
commercial crop of India?
a) Water lily
b) Water chestnut
c) Foxnut
d) Lotus
ANSWERS:
1.c
2.c
7.c
8.a
13.b
14.c
19.a
20.a
10. Which aquaƟc plant has become a great threat to water
ways?
a) Lotus
b) Water lily
c) Water hyacinth
d) Duckweed
SCIENCE REPORTER, AUGUST 2015
b) Water chestnut
d) Victoria water lily
3.a
9.c
15.c
4.d
10.c
16.b
5.b
11.a
17.a
6.d
12.a
18.c
Contributed by Shri Soumendra Nath Das, H No B-1/359,
PO-Kalyani, Dist: Nadia, West Bengal-741235, Email:
[email protected]
58
TEST YOUR KNOWLEDGE
JAGDISH VALECHA
1. The smallest possible sequence of nucleo des present on
m-RNA strand which can specify one par cular amino acid is
called:
a) AnƟcodon
b) Nucleosome
c) Codon
d) Histone
2. The term ‘Gene c code’ was coined by:
a) Gamow
b) Nawaschin
c) Tatum
d) Crick
3. How many nitrogen bases are present in a codon?
a) 1
b) 2
c) 4
d) 3
4. The ini a on codon is:
a) CAU
c) AUG
b) GAU
d) CAA
5. Nirenberg discovered the first triplet codon UUU) It codes for
the amino acid:
a) Tyrosine
b) Phenylalanine
c) Valine
d) Tryptophan
6. If each codon has two nitrogen bases, the possible number of
codons would be:
a) 16
b) 4
c) 64
d) 61
7. In Prokaryotes, the ini a on codon AUG codes for the amino
acid:
a) Methionine
b) Serine
c) Glycine
d) N-Formylmethionine
8. A gene c code can be read only in _______ direc on.
a) 3’ - 5’
b) 5’ - 3’
c) 5’ - 5
d) 3’ - 3’
9. An codon is present on:
a) r-RNA
c) DNA
b) t-RNA
d) m-RNA
10. Which of the groups of codons code for the amino acid
Aspar c acid?
a) GAT, GAC
b) AAA, AAG
c) GUU, GUA
d) CAU, CAC
13. There are _______ sense codons coding for the 20 amino
acids.
a) 61
b) 64
c) 21
d) 32
14. Two or more codons specify the same amino acid) This
statement indicates that the gene c code is:
a) comma-less
b) degenerate
c) universal
d) ambiguous
15. ‘Wobble effect’ holds true for the _______ nitrogen base of
the codon.
a) First
b) Second
c) Third
d) Fourth
16. Wobble hypothesis was proposed by:
a) MaƩhaei
b) Watson
c) Khorana
d) Crick
17. The nitrogen base which is never seen in any codon is:
a) Thymine
b) Adenine
c) Uracil
d) Guanine
18. The an codon on t-RNA for the codon GUU will be
a) CCA
b) CAA
c) CTT
d) GUA
19. The gene c code is used by all the organisms, suggests that
it is:
a) Polar
b) Non-ambiguous
c) Degenerate
d) Universal
20. Iden fy the Incorrect statement.
a) GeneƟc code is comma-less.
b) GeneƟc code is non-ambiguous.
c) GeneƟc code is overlapping.
d) GeneƟc code is degenerate.
ANSWERS:
1.c
2.a
7.d
8. b
13.a
14.b
19. d
20. c
11. The non-sense codon ‘Opal’ is coded by:
a) UAA
b) UAG
c) GAU
d) UGA
12. Which of the following codon codes for the same amino acid
as UAU?
a) UAA
b) UAG
c) UAC
d) UGA
3.d
9.b
15. c
4.c
10.a
16. d
5.b
11.d
17. a
6.a
12.c
18.b
Contributed by Mr. Jagdish Valecha, Content Writer at Target Publications
Pvt. Ltd., Mumbai and Geli Enterprises (www.biology.lifeeasy.org). Address:
3-A Saturn CHS Ltd, 3rd Floor, Tagore Road, Near Laxmi Narayan Temple,
Santacruz (West), Mumbai-400054; Email: [email protected]
59
SCIENCE REPORTER, AUGUST 2015