Biology | Study Mode

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Question 11
A
Hydrolysis
B
Osmosis
C
Plasmolysis
D
Inhibition
Explanation
If a cell is placed in a weaker (i.e. hypotonic) solution, they swell and may even burst. The phenomenon is known as haemolysis. Just like osmosis which in the movement of solvent molecule of high concentration to lower concentration through semi permeable membrane.(B).

Correct option: B
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Question 12
A
Centrioles, chromatides and nucleolus
B
Homologous chromosome, nuclear membrane
C
Cell wall, centrioles and chromatids
D
Chromosomes, nuclear membrane and centromere
Explanation
At the interphase, the chromosome are not visible as distinct bodies, either under light microscope or electron microscope at this stage, they form a long chromatin strands or threads. Not until prophase where the chromatin threads condense to form visible chromosome. The nucleolus disappear at the late prophase stage. Note: check textbooks. (B).

Correct option: B
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Question 13
A
Anaphase
B
Telophase
C
Prophase
D
Interphase
Explanation
The interphase is described as Resting stage but it is a complete misnormer because the genetic material replicate and cell builds up at this stage (D).

Correct option: D
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Question 14
A
Reproducing and photosynthesizing
B
Excreting and deaminating
C
Respiring and photosynthesizing
D
Replicating and photosynthesizing
Explanation
Mitochoiidria is the power house, food material is oxidized to give energy while chioroplast is involved in photosynthesis(C).

Correct option: C
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Question 15
A
Mitochondria
B
Ribosome
C
Contractile vacuole
D
Golgi body
Explanation
Contractile vacuole helps in osmo regulation that is, regulation of amount of water in the cell. Ribosome is for protein synthesis.(C).

Correct option: C
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Question 16
A
Meristem
B
Cambium
C
Xylem
D
Phloem
Explanation
Meristem is the tissue capable of cell division. The xylem contains several large thick walled tubes called vessels in which the soil solution is carried from the root to the leaves, they do not contain cytoplasm i.e. they are dead. (C).

Correct option: C
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Question 17
A
Epiphytes
B
Mesophytes
C
Hydrophytes
D
xerophytes
Explanation
Xerophytes are plants that adapts to desert habitat (D).

Correct option: D
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Question 18
A
Heterotrophic
B
Saprophytic
C
Chlorophytic
D
Autotrophic
Explanation
Green plant are anthrotrophic, they synthesize their food themselves (D).

Correct option: D
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Question 19
A
pectin
B
chitin
C
lignin
D
tannin
Explanation
Chitin is a proteinous material that made up exoskeleton in insects( Arthropod) (B).

Correct option: B
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Question 20
A
Energy cycle
B
Krebs cycle
C
Water cycle
D
Carbon cycle
Explanation
In terms of ATP synthesis Krebs cycle is the most important source of energy in metabolism and it achieves this by donating hydrogen atom(s) to the carrier system. This takes place during respiration (B).

Correct option: B

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