A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
a.
Yellow – Green – Violet – Gold
b.
Yellow – Violet – Orange – Silver
Correct Answer
c.
Violet – Yellow – Orange – Silver
d.
Green – Orange – Violet – Gold
Step-by-Step AI Explanation
Verified Method
47 kΩ = 47 × 10^3 Ω, and the tolerance ±4.7 kΩ corresponds to ±10%. Thus the 4-band code is Yellow (4), Violet (7), Orange (10^3), Silver (±10%).
Q44mcq
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by Δl on applying a force F, how much force is needed to stretch the second wire by the same amount?
a.
4F
b.
6F
c.
9F
Correct Answer
d.
F
Step-by-Step AI Explanation
Verified Method
Same volume means if the second wire has area 3A, its length is l/3. Using Δl = FL/(AY), the required force comes out to be 9F.
Q91mcq
Oxygen is not produced during photosynthesis by
a.
Cycas
b.
Nostoc
c.
Green sulphur bacteria
Correct Answer
d.
Chara
Step-by-Step AI Explanation
Verified Method
Green sulphur bacteria perform anoxygenic photosynthesis and do not use water as the electron donor, so oxygen is not released.
Q92mcq
Double fertilization is
a.
Fusion of two male gametes with one egg
b.
Fusion of one male gamete with two polar nuclei
c.
Fusion of two male gametes of a pollen tube with two different eggs
d.
Syngamy and triple fusion
Correct Answer
Step-by-Step AI Explanation
Verified Method
Double fertilization in angiosperms consists of syngamy and triple fusion.
Q93mcq
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.
Banana
b.
Yucca
Correct Answer
c.
Hydrilla
d.
Viola
Step-by-Step AI Explanation
Verified Method
Yucca shows obligate mutualism with a moth (Pronuba); each depends on the other for completion of its life cycle.
Q94mcq
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
a.
–196°C
Correct Answer
b.
–80°C
c.
–120°C
d.
–160°C
Step-by-Step AI Explanation
Verified Method
Liquid nitrogen is at –196°C, which is used for cryopreservation of pollen grains.
Q95mcq
Which of the following elements is responsible for maintaining turgor in cells?
a.
Potassium
Correct Answer
b.
Sodium
c.
Magnesium
d.
Calcium
Step-by-Step AI Explanation
Verified Method
Potassium helps maintain cell turgidity by regulating osmotic balance.
Q96mcq
What is the role of NAD+ in cellular respiration?
a.
It is a nucleotide source for ATP synthesis.
b.
It functions as an electron carrier.
Correct Answer
c.
It functions as an enzyme.
d.
It is the final electron acceptor for anaerobic respiration.
Step-by-Step AI Explanation
Verified Method
NAD+ acts as an electron carrier in cellular respiration by accepting electrons and becoming NADH.
Q97mcq
In which of the following forms is iron absorbed by plants?
a.
Free element
b.
Ferrous
c.
Ferric
Correct Answer
d.
Both ferric and ferrous
Step-by-Step AI Explanation
Verified Method
As per NCERT, plants absorb iron mainly in the ferric form (Fe3+).
Q98mcq
Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
a.
λ phage
b.
Ti plasmid
c.
Retrovirus
Correct Answer
d.
pBR322
Step-by-Step AI Explanation
Verified Method
Retrovirus is commonly used as a vector for introducing a DNA fragment into human lymphocytes in gene therapy.
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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.
(ii) (iv) (iii) (i)
b.
(iii) (ii) (i) (iv)
c.
(i) (iv) (iii) (ii)
d.
(iii) (iv) (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) 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.
i ii iii
b.
i iii ii
c.
iii i ii
d.
ii i iii
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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.
i iv ii iii
b.
iii i iv ii
c.
iii ii i iv
d.
iv 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. 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.
a–iii, b–i, c–iv, d–ii
b.
a–iii, b–i, c–iv, d–ii
c.
a–iii, b–ii, c–i, d–iv
d.
a–iv, b–iii, c–ii, 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:
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.
a-iii, b-iv, c-i, d-ii
b.
a-i, b-iii, c-iv, d-ii
c.
a-ii, b-i, c-iii, d-iv
d.
a-i, b-ii, c-iv, d-iii
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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.
a-iii, b-iv, c-i, d-ii
b.
a-i, b-iii, c-iv, d-ii
c.
a-ii, b-i, c-iii, d-iv
d.
a-i, b-ii, c-iv, d-iii
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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.
a-ii, b-iii, c-i
b.
a-i, b-iii, c-ii
c.
a-iii, b-ii, c-i
d.
a-iii, b-i, c-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) 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-ii, b-iii, c-i, d-iv
b.
a-i, b-ii, c-iii, d-iv
c.
a-iii, b-ii, c-iv, d-i
d.
a-iv, b-i, c-ii, d-iii
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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) | Column II (Part of excretory system)
a. Ultrafiltration
b. Concentration of urine
c. Transport of urine
d. Storage of urine
a.
v iv i ii
b.
iv i ii iii
c.
iv v ii iii
d.
v iv i iii
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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 | Column II
a. Fibrinogen
b. Globulin
c. Albumin
a.
(i) Osmotic balance, (ii) Blood clotting, (iii) Defence mechanism
b.
(i) Osmotic balance, (ii) Blood clotting, (iii) Defence mechanism
c.
(iii) Defence mechanism, (ii) Blood clotting, (i) Osmotic balance
d.
(ii) Blood clotting, (iii) Defence mechanism, (i) Osmotic balance
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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.
b, d and e
b.
a, b and c
c.
b, c and e
d.
a, c and e
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