Q.1
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
  • \(-120^0C\)
  • \(-80^0C\)
  • \(-196^0C\)
  • \(-160^0C\)
Q.2
Which of the following hormones can play a significant role in osteoporosis?
  • Parathyroid hormone and Prolactin
  • Estrogen and Parathyroid hormone
  • Progesterone and Aldosterone
  • Aldosterone and Prolactin
Q.3
Double fertilization is
  • Fusion of one male gamete with two polar nuclei
  • Fusion of two male gametes of a pollen tube with two different eggs
  • Syngamy and triple fusion
  • Fusion of two male gametes with one egg
Q.4
The difference between spermiogenesis and spermiation is
  • In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
  • In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
  • In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
  • In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
Q.5
Which one of the following population interactions is widely used in medical science for the production of antibiotics?
  • Mutualism
  • Amensalism
  • Parasitism
  • Commensalism
Q.6
What is the role of \(NAD^+\) in cellular respiration?
  • It functions as an enzyme.
  • It is a nucleotide source for ATP synthesis.
  • It functions as an electron carrier.
  • It is the final electron acceptor for anaerobic respiration.
Q.7
Match the columns
Column I Column II
a. Proliferative Phase (i) Breakdown of endometrial lining
b. Secretory Phase (ii) Follicular Phase
c. Menstruation (iii) Luteal Phase
  • a -- iii b -- i c -- ii
  • a -- ii b -- iii c -- i
  • a -- iii b -- ii c -- i
  • a -- i b -- iii c -- ii
Q.8
Natality refers to
  • Birth rate
  • Number of individuals entering a habitat
  • Death rate
  • Number of individuals leaving the habitat
Q.9
Which of the following structures or regions is incorrectly paired with its functions?
  • Corpus callosum : band of fibers connecting left and right cerebral hemispheres
  • Medulla oblongata : controls respiration and ardiovascular reflexes
  • Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement
  • Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst
Q.10
The two functional groups characteristic of sugars are
  • Carbonyl and hydroxyl
  • Carbonyl and methyl
  • Hydroxyl and methyl
  • Carbonyl and phosphate
Q.11
Select the incorrect match :
  • Polytene chromosomes – Oocytes of amphibians
  • Lampbrush chromosomes – Diplotene bivalents
  • Submetacentric chromosomes – L-shaped chromosome
  • Allosomes – Sex chromosomes
Q.12
Which part of poppy plant is used to obtain the drug “Smack”?
  • Roots
  • Flowers
  • Latex
  • Leaves
Q.13
Match the columns
Column I Column II
a. Fibrinogen (i) Osmotic balance
b. Globulin (ii) Blood clotting
c. Albumin (iii) Defence mechanism
  • a -- i b -- ii c -- iii
  • a -- ii b -- iii c -- i
  • a -- iii b -- ii c -- i
  • a -- i b -- iii c -- ii
Q.14
Which of the following is not a product of light reaction of photosynthesis?
  • Oxygen
  • NADPH
  • ATP
  • NADH
Q.15
The experimental proof for semiconservative replication of DNA was first shown in a
  • Plant
  • Fungus
  • Bacterium
  • Virus
Q.16
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
  • Inflammation of bronchioles; Decreased respiratory surface
  • Increased number of bronchioles; Increased respiratory surface
  • Decreased respiratory surface; Inflammation of bronchioles
  • Increased respiratory surface; Inflammation of bronchioles
Q.17
Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system
  • Amphibia
  • Aves
  • Reptilia
  • Osteichthyes
Q.18
Match the columns
Column I Column II
a. Glycosuria (i) Accumulation of
uric acid in joints
b. Gout (ii) Mass of crystallised
salts within the
kidney
c. Renal calculi (iii) Inflammation in
glomeruli
d. Glomerular nephritis (iv) Presence of glucose in urine
  • a -- iii b -- ii c -- iv d -- i
  • a -- iv b -- i c -- ii d -- iii
  • a -- i b -- ii c -- iii d -- iv
  • a -- ii b -- iii c -- i d --iv
Q.19
Which of the following is a secondary pollutant?
  • \(CO\)
  • \(SO_2\)
  • \( O_3\)
  • \(CO_2\)
Q.20
In which of the following forms is iron absorbed by plants?
  • Free element
  • Ferric
  • Both ferric and ferrous
  • Ferrous
Q.21
Which of the following is true for nucleolus?
  • Larger nucleoli are present in dividing cells
  • It takes part in spindle formation
  • It is a membrane-bound structure
  • It is a site for active ribosomal RNA synthesis
Q.22
The transparent lens in the human eye is held in its place by
  • ligaments attached to the iris
  • smooth muscles attached to the iris
  • ligaments attached to the ciliary body
  • smooth muscles attached to the ciliary body
Q.23
Niche is
  • the range of temperature that the organism needs to live
  • the functional role played by the organism where it lives
  • all the biological factors in the organism's environment
  • the physical space where an organism lives
Q.24
In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
  • Ascariasis
  • Ringworm disease
  • Elephantiasis
  • Amoebiasis
Q.25
Oxygen is not produced during photosynthesis by
  • Nostoc
  • Green sulphur bacteria
  • Cycas
  • Chara
Q.26
Conversion of milk to curd improves its nutritional value by increasing the amount of
  • Vitamin A
  • Vitamin E
  • Vitamin \(B_{12}\)
  • Vitamin D
Q.27
Match the columns
Column I Column II
a. Eutrophication (i) UV-B radiation
b. Sanitary landfill (ii) Deforestation
c. Snow blindness (iii) Nutrient enrichment
d. Jhum cultivation (iv) Waste disposal
  • a. -- ii b. -- i c. -- iii d. -- iv
  • a. -- iii b. -- iv c. -- i d. -- ii
  • a. -- i b. -- ii c. -- iv d. -- iii
  • a. -- i b. -- iii c. -- iv d. -- ii
Q.28
Match the columns
Column I Column II
a. Tidal volume (i) 2500 – 3000 mL
b. Inspiratory Reserve volume (ii) 1100 – 1200 mL
c. Expiratory Reserve volume (iii) 500 – 550 mL
d. Expiratory Reserve volume (iv) 1000 – 1100 mL
  • a -- iii b -- i c -- iv d -- ii
  • a -- iii b -- ii c -- i d -- iv
  • a -- iv b -- iii c -- ii d -- i
  • a -- i b -- iv c -- ii d -- iii
Q.29
What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer : 10 g
  • Upright pyramid of biomass
  • Inverted pyramid of biomass
  • Upright pyramid of numbers
  • Pyramid of energy
Q.30
Which of the following organisms are known as chief producers in the oceans?
  • Diatoms
  • Dinoflagellates
  • Euglenoids
  • Cyanobacteria
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