111. Spliceosomes are not found in cells of

(1) Plants

(2) Fungi

(3) Animals

(4) Bacteria

Answer (4)

Sol. Spliceosomes are used in removal of introns during post-transcriptional processing of hnRNA in eukaryotes only as split genes are absent as prokaryotes.

112. An example of colonial alga is

(1) Chlorella

(2) Volvox

(3) Ulothrix

(4) Spirogyra

Answer (2)

Sol. Volvox is motile colonial fresh water alga with definite number of vegetative cells.

113. Which of the following represents order of ‘Horse’?

(1) Equidae

(2) Perissodactyla

(3) Ca ba Ilus

(4) Ferus

Answer (2)

Sol. Horse belongs to order perissodactyla of class mammalia. Perissodactyla includes odd-toed mammals.

114. Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

(1) Lysosome

(2) Ri bosome

(3) Chloroplast

(4) Mitochondrion

Answer (4)

Sol. Mitochondria are the site of aerobic oxidation of carbohydrates to generate ATP.

115. The process of separation and purification expressed protein before marketing is called

(1) Upstream processing

(2) Downstream processing

(3) Bioprocessing

(4) Postproduction processing

Answer (2)

Sol. Biosynthetic stage for synthesis of product in recombinant DNA technology is called upstreaming process while after completion of biosynthetic stage, the product has to be subjected through a series of processes which include separation and purification are collectively referred to as downstreaming processing.

116. Mycorrhizae are the example of

(1) Fungistasis

(2) Amensalism

(3) Antibiosis

(4) Mutualism

Answer (4)

Sol. Mycorrhizae is a symbiotic association of fungi with roots of higher plants.

117. Viroids differ from viruses in having :

(1) DNA molecules with protein coat

(2) DNA molecules without protein coat

(3) RNA molecules with protein coat

(4) RNA molecules without protein coat

Answer (4)

Sol. Viroids are sub-viral agents as infectious RNA particles, without protein coat.

118. Root hairs develop from the region of

(1) Maturation

(2) Elongation

(3) Root cap

(4) Meristematic activity

Answer (1)

Sol. In roots, the root hairs arise from zone of maturation. This zone is differentiated zone thus bearing root hairs.

119. Coconut fruit is a

(1) Drupe

(2) Berry

(3) Nut

(4) Capsule

Answer (1)

Sol. Coconut fruit is a drupe. A drupe develops from monocarpellary superior ovary and are one seeded.

120. Plants which produce characterstic pneumatophores and show vivipary belong to

(1) Mesophytes

(2) Halophytes

(3) Psammophytes

(4) Hydrophytes

Answer (2)

Sol. Halophytes growing in saline soils show

(i) Vivipary which is in-situ seed germination

(ii) Pneumatophores for gaseous exchange

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