the functional role played by the organism where it lives
Correct Answer
b.
the range of temperature that the organism needs to live
c.
the physical space where an organism lives
d.
all the biological factors in the organism’s environment
Step-by-Step AI Explanation
Verified Method
A niche describes the functional role and position of an organism in its ecosystem, not merely its habitat or environmental factors.
Q2mcq
Which of the following is a secondary pollutant?
a.
O3
Correct Answer
b.
SO2
c.
CO2
d.
CO
Step-by-Step AI Explanation
Verified Method
Ozone (O3) is a secondary pollutant formed in the atmosphere by photochemical reactions; SO2, CO2 and CO are primary pollutants.
Q3mcq
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
a.
Oxygen
b.
Fe
c.
Cl
Correct Answer
d.
Carbon
Step-by-Step AI Explanation
Verified Method
Chlorine atoms from chlorofluorocarbons catalytically destroy ozone in the stratosphere.
Q4mcq
World Ozone Day is celebrated on
a.
22nd April
b.
16th September
Correct Answer
c.
21st April
d.
5th June
Step-by-Step AI Explanation
Verified Method
World Ozone Day is observed on 16 September, commemorating the Montreal Protocol.
Q5mcq
What type of ecological pyramid would be obtained with the following data?
Secondary consumer: 120 g
Primary consumer: 60 g
Primary producer: 10 g
a.
Upright pyramid of biomass
b.
Upright pyramid of numbers
c.
Pyramid of energy
d.
Inverted pyramid of biomass
Correct Answer
Step-by-Step AI Explanation
Verified Method
The biomass increases at successive trophic levels, so it represents an inverted pyramid of biomass.
Q6mcq
Natality refers to
a.
Number of individuals entering a habitat
b.
Number of individuals leaving the habitat
c.
Birth rate
Correct Answer
d.
Death rate
Step-by-Step AI Explanation
Verified Method
Natality means the birth rate in a population.
Q7mcq
Offsets are produced by
a.
Parthenogenesis
b.
Parthenocarpy
c.
Mitotic divisions
Correct Answer
d.
Meiotic divisions
Step-by-Step AI Explanation
Verified Method
Offsets are vegetative propagules formed by mitotic division, as seen in plants like water hyacinth and Pistia.
Q8mcq
The experimental proof for semiconservative replication of DNA was first shown in a
a.
Virus
b.
Plant
c.
Bacterium
Correct Answer
d.
Fungus
Step-by-Step AI Explanation
Verified Method
Meselson and Stahl demonstrated semiconservative DNA replication in the bacterium Escherichia coli.
Q9mcq
Select the correct match:
a.
Francois Jacob and Jacques Monod – Lac operon
Correct Answer
b.
Matthew Meselson and F. Stahl – Pisum sativum
c.
Alfred Hershey and Martha Chase – TMV
d.
Alec Jeffreys – Streptococcus pneumoniae
Step-by-Step AI Explanation
Verified Method
Francois Jacob and Jacques Monod discovered the lac operon model. Meselson and Stahl worked on DNA replication, Hershey and Chase used bacteriophage, and Alec Jeffreys developed DNA fingerprinting.
Q9mcq
Select the correct match:
a.
Francois Jacob and Jacques Monod – Lac operon
Correct Answer
b.
Matthew Meselson and F. Stahl – Pisum sativum
c.
Alfred Hershey and Martha Chase – TMV
d.
Alec Jeffreys – Streptococcus pneumoniae
Step-by-Step AI Explanation
Verified Method
Francois Jacob and Jacques Monod are associated with the lac operon model. The other matches are incorrect: Meselson and Stahl studied semiconservative replication in E. coli, Hershey and Chase worked on bacteriophage, and Alec Jeffreys is known for DNA fingerprinting.
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Herbarium, b. Key, c. Museum, d. Catalogue
Column II: i. It is a place having a collection of preserved plants and animals. ii. A list that enumerates methodically all the species found in an area with brief description aiding identification. iii. Is a place where dried and pressed plant specimens mounted on sheets are kept. iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
a.
a-iii, b-iv, c-i, d-ii
b.
a-ii, b-iv, c-iii, d-i
c.
a-iii, b-ii, c-i, d-iv
d.
a-i, b-iv, c-iii, d-ii
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
a.
Viola
b.
Banana
c.
Yucca
d.
Hydrilla
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Eutrophication
b. Sanitary landfill
c. Snow blindness
d. Jhum cultivation
Column II
i. UV-B radiation
ii. Deforestation
iii. Nutrient enrichment
iv. Waste disposal
a.
i ii iv iii
b.
iii iv i ii
c.
i iii iv ii
d.
ii i iii iv
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Fibrinogen
b. Globulin
c. Albumin
Column II
i. Osmotic balance
ii. Blood clotting
iii. Defence mechanism
a.
ii iii i
b.
i iii ii
c.
i ii iii
d.
iii ii i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Proliferative Phase
b. Secretory Phase
c. Menstruation
Column II
i. Breakdown of endometrial lining
ii. Follicular Phase
iii. Luteal Phase
a.
iii i ii
b.
ii iii i
c.
i iii ii
d.
iii ii i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Proliferative Phase
b. Secretory Phase
c. Menstruation
Column II
i. Breakdown of endometrial lining
ii. Follicular Phase
iii. Luteal Phase
a.
iii i ii
b.
ii iii i
c.
i iii ii
d.
iii ii i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tricuspid valve
b. Bicuspid valve
c. Semilunar valve
Column II
i. Between left atrium and left ventricle
ii. Between right ventricle and pulmonary artery
iii. Between right atrium and right ventricle
a.
ii i iii
b.
i ii iii
c.
i iii ii
d.
iii i ii
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory reserve volume
c. Expiratory reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
a.
iv iii ii i
b.
i iv ii iii
c.
iii i iv ii
d.
iii ii i iv
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Glycosuria
b. Gout
c. Renal calculi
d. Glomerular nephritis
Column II
i. Accumulation of uric acid in joints
ii. Mass of crystallised salts within the kidney
iii. Inflammation in glomeruli
iv. Presence of glucose in urine
a.
a-iv, b-i, c-ii, d-iii
b.
a-ii, b-iii, c-i, d-iv
c.
a-i, b-ii, c-iii, d-iv
d.
a-iii, b-ii, c-iv, d-i
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function)
a. Ultrafiltration
b. Concentration of urine
c. Transport of urine
d. Storage of urine
Column II (Part of Excretory System)
i. Henle’s loop
ii. Ureter
iii. Urinary bladder
iv. Malpighian corpuscle
v. Proximal convoluted tubule
a.
a- v, b- iv, c- i, d- iii
b.
a- v, b- iv, c- i, d- ii
c.
a- iv, b- i, c- ii, d- iii
d.
a- iv, b- v, c- ii, d- iii
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Which of the following characteristics represent inheritance of blood groups in humans?
a. Dominance
b. Co-dominance
c. Multiple allele
d. Incomplete dominance
e. Polygenic inheritance
a.
a, c and e
b.
b, d and e
c.
a, b and c
d.
b, c and e
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