Select the correct route for the passage of sperms in male frogs :
(1) Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca
(2) Testes → Bidder's canal → Kidney → Vasa efferentia → Urinogenital duct → Cloaca
(3) Testes → Vasa efferentia → Kidney → Seminal vesicle → Urinogenital duct → Cloaca
(4) Testes → Vasa efferentia → Bidder's canal → Ureter → Cloaca

If there are 999 bases in an RNA that codes for a
protein with 333 amino acids, and the base at position
901 is deleted such that the length of the RNA becomes
998 bases, how many codons will be altered ?
(1) 333
(2) 1
(3) 11
(4) 33

Which of the following facilitates opening of stomatal aperture ?
(1) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
(2) Contraction of outer wall of guard cells
(3) Decrease in turgidity of guard cells
(4) Radial orientation of cellulose microfibrils in the cell wall of guard cells

Anaphase Promoting Complex (APC) is protein degradation machinery necessary for proper mitosis of animal
cells. If APC is defective in a human cell, which of the following is expected to occur ?
(1) Recombination of chromosome arms will occur
(2) Chromosomes will not condense
(3) Chromosomes will be fragmented
(4) Chromosomes will not segregate

Life cycle of Ectocarpus and Fucus respectively are :
(1) Haplodiplontic, Haplontic
(2) Haplontic, Diplontic
(3) Diplontic, Haplodiplontic
(4) Haplodiplontic, Diplontic

Which statements is wrong for Krebs' cycle?
(1) The cycle starts with condensation of acetyl group
(acetyl CoA) with pyruvic acid to yield citric acid.
(2) There are three points in the cycle where ``NAD^+`` is
reduced to NADH + ``H^+``.
(3) There is one point in the cycle where ``FAD^+`` is reduced to ``FADH_2``
(4) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised

Transplantation of tissues/ organs fails often due to
non-acceptance by the patient's body. Which type of immune-
response is responsible for such rejections?
(1) Physiological immune response
(2) Autoimmune response
(3) Cell-mediated immune response
(4) Hormonal immune response

Artificial selection to obtain cows yielding higher
milk output represents :
(1) stabilizing followed by disruptive as it stabilizes
the population to produce higher yielding cows.
(2) stabilizing selection as it stabilizes this
character in the population.
(3) directional as it pushes the mean of the character
in one direction.
(4) disruptive as it splits the population into two,
one yielding higher output and the other lower output.

Select the mismatch :
(1) Rhizobium - Alfalfa
(2) Frania - Alnus
(3) Rhodospirillum - Mycorrhiza
(4) Anabaena - Nitrogen fixer

Presence of plants arranged into well defined vertical
layers depending on their height can be seen best in :
(1) Temperate Forest
(2) Tropical Savannah
(3) Tropical Rain Forest
(4) Grassland

Match the following sexually transmitted diseases
(Column - I) with their causative agent (Column - II)
and select the correct option.
Column - I Column - II
(a ) Gonorrhea (i) HIV
(b) Syphilis (ii) Neisseria
(c) Genital Warts (iii) Treponema
(d) AIDS (iv) Human papilloma - virus
Options :
(a ) (b) (c) (d)
(1) (iv) (iii) (ii) (i)
(2) (ii) (iii) (iv) (i)
(3) (iii) (iv) (i) (ii)
(4) (iv) (ii) (iii) (i)

Select the mismatch :
(1) Equisetum - Homosporous
(2) Pinus - Dioecious
(3) Cycas - Dioecious
(4) Salvinia - Heterosporous

The region of Biosphere Reserve which is legally
protected and where no human activity is allowed is
known as :
(1) Restoration zone
(2) Core zone
(3) Buffer zone
(4) Transition zone

Identify the wrong statement in context of heartwood :
(1) It comprises dead elements with highly lignified walls
(2) Organic compounds are deposited in it
(3) It is highly durable.
(4) It conducts water and minerals efficiently

The function of copper ions in copper releasing IUD's is :
(1) They inhibit ovulation
(2) They suppress sperm motility and fertilising capacity of sperms.
(3) They inhibit gametogenesis.
(4) They make uterus unsuitable for implantation