Q1. Tonoplast is :
A. A feature of all cells.
B. Found in prokaryotic cells only.
C. Found in plant cells only.
D. Found in animal cells only
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (C) Found in plant cells only – Tonoplast is a cytoplasmic membrane surrounding a large central vacuole in plant cells.[/su_spoiler]
Q2. The cell wall of both bacteria and cyanobacteria contains:
A. Lipid
B. Pectin
C. Protein
D. Muramic acid
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (D) Muramic acid – It is a characteristic feature of prokaryotic cell wall. [/su_spoiler]
Q3. The stage of meiosis in which pairing of homologous chromosomes starts, is
called:
A. Leptotene
B. Zygotene
C. Diplotene
D. Pachytene – [su_spoiler title=”Show Answer” style=”fancy”]Answer: (B) Zygotene During Zygotene phase homologous chromosomes comes close to each other and start pairing that is called synapsis.[/su_spoiler]
Q4. A duplicated chromosome has how many chromatids ?
A. One
B. Two
C. Three
D. Four
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (B) Two – The two chromatids of a duplicated chromosome are held together at the centromere.[/su_spoiler]
Q5. The Ecological pyramid that is always upright:
A. Pyramid of Energy
B. Pyramid of Biomass
C. Pyramid of Number
D. None of the options
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (A) Pyramid of Energy – Pyramids of energy are always upright, as energy is lost at each trophic level.[/su_spoiler]
Q6. The main components of photochemical smog are:
A. Water Vapour
B. Sulphur Dioxide
C. Oxides of Nitrogen
D. All options are correct
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (C) Oxides of Nitrogen – Photochemical smog is formed through the reaction of solar radiation with airborne pollutants like nitrogen oxides and volatile organic compounds.[/su_spoiler]
Q7. Which of the following chromosomes are responsible for most of the sexlinked traits?
A. 13
B. Y
C. 15
D. X
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (D) X – There are many X-linked diseases, such as hemophilia, colorblindness etc. but known Y-linked diseases are few and very rare.[/su_spoiler]
Q8. The taxonomic unit ‘Phylum’ in the classification of animals is equivalent to which hierarchical level in classification of plants:
A. Class
B. Order
C. Division
D. Family
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (C) Division – “Phylum” applies formally to any biological domain, but it is always used for animals, whereas “Division” is often used forplants.[/su_spoiler]
Q9. The anthesis is a phenomenon, which refers to:
A. Development of anthers
B. Stigma receptors
C. Opening of flower bud
D. Reproduction in plants
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (C) Opening of Flower bud – Anthesis refers to the time of flowering, whenflower bud opens with parts available for pollination. [/su_spoiler]
Q10. The fruit of coconut is:
A. Berry
B. Drupe
C. Nut
D. Pome
[su_spoiler title=”Show Answer” style=”fancy”]Answer: (B) Drupe – Coconuts is a drupe fruit with a hard stony covering enclosing the seed. [/su_spoiler]
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