Botany

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Q11. All the following events take place during the telophase stage of mitosis except:
  • Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements.
  • Nuclear envelope develops around the chromosome clusters at each pole forming two daughter nuclei.
  • Nucleolus, Golgi complex and ER re-form.
  • Microtubules get organised into spindle fibres.
Q12. Consider the given two statements:
Statement I: In male honeybees, haploid cells divide by mitosis.
Statement II: Higher plants show mitotic divisions only in diploid cells.

 

  • Statement Iis correct andStatement IIis incorrect.
  • Statement Iis incorrect andStatement IIis incorrect.
  • Statement Iis correct andStatement IIis correct.
  • Statement Iis incorrect andStatement IIis correct.
Q13. Some organisms have big-bang reproduction – they breed only once in their lifetime, produce many progeny and usually die after the event. An example of such organism may be:
  • Most perennial plants
  • Birds
  • Pacific salmon
  • Humans
Q14. Consider the given two statements:
Assertion (A): Transcription and translation can be coupled in bacteria.
Reason (R): In bacteria, mRNA does not require any processing to become active, and transcription and translation take place in the same compartment.

 

  • Both(A)and(R)are True and(R)correctly explains(A).
  • (A)is True but(R)is False.
  • Both(A)and(R)are True but(R)does not correctly explain(A).
  • (A)is False but(R)is True.
Q15. A recent record of 2000 years old viable seed has been discovered during the archaeological excavation at King Herod’s palace near the Dead Sea. This seed is of:
  • Lupinus arcticus
  • Phoenix dactylifera
  • Strobilanthes kunthiana
  • Arabidopsis thaliana
Q16. Consider the two statements:
Assertion (A): Gibberellins are used to increase the length of grape stalks.
Reason (R): Gibberellins help overcome apical dominance.

 

  • Both(A)and(R)are True and(R)correctly explains(A).
  • Both(A)and(R)are True but(R)does not correctly explain(A).
  • (A)is True;(R)is False.
  • (A)is False;(R)is True.
Q17. Which of the following movement across a cell membrane will require the utilisation of ATP energy?
  • Movement of neutral solutes along the concentration gradient.
  • Osmosis of water from higher to lower concentration.
  • Movement of polar molecules along the concentration gradient facilitated by a carrier protein.
  • Transport of ions against their concentration gradient.
Q18. Which of the following is not true regarding the structure of the cell wall in members of various Kingdoms in Whittaker’s classification system?
  • It is composed of polysaccharides and amino acids in Monera.
  • All members of Kingdom Protista have a cell wall, usually cellulosic.
  • Cell wall with chitin is present in Fungi.
  • Animals lack a cell wall in their cells.
Q19. Evolutionarily, the first terrestrial plants to possess vascular tissues – xylem and phloem, are:
  • ryophytes
  • Pteridophytes
  • Gymnosperms
  • ngiosperms
Q20. Match each item in Column-I with one in Column-II and select the correct match from the codes given [assume independent assortment wherever applicable]:
Column-I Column-II
A. Number of types of genotypes in F2 progeny of a dihybrid cross P. 4
B. Number of types of phenotypes in a dihybrid test cross Q. 9
C. Number of types of phenotypes in F2 progeny  in three polygenes R. 7
S. 8
  • Q   P   S
  • Q   P   R
  • P   Q   R
  • P   Q   S
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