Botany

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.

ย 

  • 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 โ€“ 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.

ย 

  • 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 Herodโ€™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.

ย 

  • 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 inย members of various Kingdoms in Whittakerโ€™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 โ€“ 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 progenyย  in three polygenes R. 7
S. 8
  • Q   P   S
  • Q   P   R
  • P   Q   R
  • P   Q   S
1 2 3 4