NEET Biology 3

Question 1

Which of the following is NOT a characteristic of cancer cells?

Accepted Answer

Increased apoptosis

Answer

Cancer cells typically evade apoptosis (programmed cell death) rather than showing increased apoptosis.

Question 2

Synapsis refers to:

Accepted Answer

Pairing of homologous chromosomes

Answer

Synapsis is the pairing of homologous chromosomes during zygotene of Prophase I, facilitated by the synaptonemal complex.

Question 3

The R-group of which amino acid contains a sulfhydryl (-SH) group important for disulfide bonds?

Accepted Answer

Cysteine

Answer

Cysteine contains a sulfhydryl (-SH) group that forms disulfide bonds (-S-S-) critical for protein tertiary structure.

Question 4

Emasculation in plant breeding refers to:

Accepted Answer

Removal of anthers from bisexual flowers before pollen maturation

Answer

Emasculation removes anthers from bisexual flowers before pollen matures to prevent self-pollination in controlled crosses.

Question 5

Which hormone is produced by the corpus luteum after ovulation?

Accepted Answer

Progesterone and estrogen

Answer

The corpus luteum secretes primarily progesterone along with some estrogen to prepare the uterus for implantation.

NEET - National Eligibility cum Entrance Test Practice Test