Match the organism with its use in biotechnology. (a) Bacillus thuringiensis (b) Thermus aquaticus (c) Agrobacterium tumefaciens (d) Salmonella typhimurium
a.
(iv), (iii), (i), (ii)
Correct Answer
b.
(iii), (ii), (iv), (i)
c.
(iii), (iv), (i), (ii)
d.
(ii), (iv), (iii), (i)
Step-by-Step AI Explanation
Verified Method
Bacillus thuringiensis produces Cry proteins (iv); Thermus aquaticus is the source of Taq DNA polymerase (iii); Agrobacterium tumefaciens is used as a cloning vector (i); Salmonella typhimurium was used in the construction of the first rDNA molecule (ii).
Q47mcq
Match the following: (a) Inhibitor of catalytic activity (b) Possess peptide bonds (c) Cell wall material in fungi (d) Secondary metabolite
a.
(iii), (i), (iv), (ii)
b.
(iii), (iv), (i), (ii)
c.
(ii), (iii), (i), (iv)
d.
(ii), (iv), (iii), (i)
Correct Answer
Step-by-Step AI Explanation
Verified Method
Inhibitor of catalytic activity is Malonate (ii); Proteins/Collagen possess peptide bonds (iv); Fungal cell wall is made of Chitin (iii); Ricin is a secondary metabolite (i).
Q48mcq
The plant parts which consist of two generations - one within the other: (a) Pollen grains inside the anther (b) Germinated pollen grain with two male gametes (c) Seed inside the fruit (d) Embryo sac inside the ovule
a.
(a), (b) and (c)
b.
(c) and (d)
c.
(a) and (d)
Correct Answer
d.
(a) only
Step-by-Step AI Explanation
Verified Method
Pollen grains (gametophyte) are within the anther (sporophyte). The embryo sac (female gametophyte) is within the ovule (sporophyte).
Q49mcq
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
a.
1 molecule of 3-C compound
Correct Answer
b.
1 molecule of 6-C compound
c.
1 molecule of 4-C compound and 1 molecule of 2-C compound
d.
2 molecules of 3-C compound
Step-by-Step AI Explanation
Verified Method
In photorespiration, RuBisCO oxygenation of RuBP leads to one molecule of 3-carbon phosphoglycerate (3-PGA) and one molecule of 2-carbon phosphoglycolate.
Q50mcq
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
a.
Gross primary productivity is always more than net primary productivity
Correct Answer
b.
Gross primary productivity and Net primary productivity are one and same
c.
There is no relationship between Gross primary productivity and Net primary productivity
d.
Gross primary productivity is always less than net primary productivity
Step-by-Step AI Explanation
Verified Method
NPP = GPP - Respiration losses (R). Since R is always positive for producers, GPP must be greater than NPP.
Q51mcq
The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are
a.
Nitrate alone
b.
Ammonia and oxygen
c.
Ammonia and hydrogen
Correct Answer
d.
Ammonia alone
Step-by-Step AI Explanation
Verified Method
The biological nitrogen fixation reaction is: N2 + 8H+ + 8e- + 16ATP -> 2NH3 + H2 + 16ADP + 16Pi. Thus, ammonia and hydrogen are produced.
Q52mcq
Identify the incorrect statement.
a.
Sapwood is involved in conduction of water and minerals from root to leaf
b.
Sapwood is the innermost secondary xylem and is lighter in colour
Correct Answer
c.
Due to deposition of tannins, resins, oils etc., heart wood is dark in colour
d.
Heart wood does not conduct water but gives mechanical support
Step-by-Step AI Explanation
Verified Method
Sapwood is the peripheral part of secondary xylem, not the innermost. The innermost part is the heartwood.
Q53mcq
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to
a.
Fungal diseases
b.
Plant nematodes
c.
Insect predators
d.
Insect pests
Correct Answer
Step-by-Step AI Explanation
Verified Method
Bt cotton is genetically modified to express insecticidal proteins, making it resistant to specific insect pests (lepidopterans, dipterans, and coleopterans).
Q54mcq
Which of the following pairs is of unicellular algae?
a.
Gelidium and Gracilaria
b.
Anabaena and Volvox
c.
Chlorella and Spirulina
Correct Answer
d.
Laminaria and Sargassum
Step-by-Step AI Explanation
Verified Method
Chlorella and Spirulina are well-known unicellular algae often used as food supplements.
Q55mcq
Strobili or cones are found in
a.
Pteris
b.
Marchantia
c.
Equisetum
Correct Answer
d.
Salvinia
Step-by-Step AI Explanation
Verified Method
In pteridophytes, strobili (cones) are formed in Equisetum and Selaginella.
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Match the following diseases with the causative organism and select the correct option.
Column-I Column-II
(a) Typhoid (i) Wuchereria
(b) Pneumonia (ii) Plasmodium
(c) Filariasis (iii) Salmonella
(d) Malaria (iv) Haemophilus
a.
(iii) (iv) (i) (ii)
b.
(ii) (i) (iii) (iv)
c.
(iv) (i) (ii) (iii)
d.
(i) (iii) (ii) (iv)
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Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
a.
(c) and (d)
b.
(a), (b) and (d)
c.
only (d)
d.
(a) and (b)
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The transverse section of a plant shows following anatomical features :
(a) Large number of scattered vascular bundles surrounded by bundle sheath
(b) Large conspicuous parenchymatous ground tissue
(c) Vascular bundles conjoint and closed
(d) Phloem parenchyma absent
Identify the category of plant and its part :
a.
Monocotyledonous root
b.
Dicotyledonous stem
c.
Dicotyledonous root
d.
Monocotyledonous stem
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Match the following columns and select the correct option.
Column-I Column-II
(a) 6-15 pairs of (i) Trygon
gill slits
(b) Heterocercal (ii) Cyclostomes
caudal fin
(c) Air Bladder (iii) Chondrichthyes
(d) Poison sting (iv) Osteichthyes
a.
(iii) (iv) (i) (ii)
b.
(iv) (ii) (iii) (i)
c.
(i) (iv) (iii) (ii)
d.
(ii) (iii) (iv) (i)
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Match the following columns and select the correct option.
Column-I: (a) 6-15 pairs of gill slits, (b) Heterocercal caudal fin, (c) Air Bladder, (d) Poison sting
Column-II: (i) Trygon, (ii) Cyclostomes, (iii) Chondrichthyes, (iv) Osteichthyes
a.
(1) (iii) (iv) (i) (ii)
b.
(2) (iv) (ii) (iii) (i)
c.
(3) (i) (iv) (iii) (ii)
d.
(4) (ii) (iii) (iv) (i)
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Match the following with respect to meiosis: (a) Zygotene, (b) Pachytene, (c) Diplotene, (d) Diakinesis. Match with (i) Terminalization, (ii) Chiasmata, (iii) Crossing over, (iv) Synapsis.
a.
(1) (iv) (iii) (ii) (i)
b.
(2) (i) (ii) (iv) (iii)
c.
(3) (ii) (iv) (iii) (i)
d.
(4) (iii) (iv) (i) (ii)
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If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10^9 bp, then the length of the DNA is approximately
a.
2.5 meters
b.
2.2 meters
c.
2.7 meters
d.
2.0 meters
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Match the trophic levels with their correct species examples in grassland ecosystem.
(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass
a.
(iii) (ii) (i) (iv)
b.
(iv) (iii) (ii) (i)
c.
(i) (ii) (iii) (iv)
d.
(ii) (iii) (iv) (i)
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Which of the following statements are true for the phylum-Chordata?
(a) In Urochordata notochord extends from head to tail and it is present throughout their life.
(b) In Vertebrata notochord is present during the embryonic period only.
(c) Central nervous system is dorsal and hollow.
(d) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.
a.
(c) and (a)
b.
(a) and (b)
c.
(b) and (c)
d.
(d) and (c)
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Match the following concerning essential elements and their functions in plants
(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
a.
(iv) (iii) (ii) (i)
b.
(iii) (iv) (ii) (i)
c.
(iv) (i) (ii) (iii)
d.
(ii) (i) (iv) (iii)
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Match the following columns and select the correct option: (a) Placenta (i) Androgens, (b) Zona pellucida (ii) Human Chorionic Gonadotropin (hCG), (c) Bulbo-urethral glands (iii) Layer of the ovum, (d) Leydig cells (iv) Lubrication of the Penis
a.
(1) (i) (iv) (ii) (iii)
b.
(2) (iii) (ii) (iv) (i)
c.
(3) (ii) (iii) (iv) (i)
d.
(4) (iv) (iii) (i) (ii)
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Match the following columns: (a) Gregarious, polyphagous pest (i) Asterias, (b) Adult with radial symmetry and larva with bilateral symmetry (ii) Scorpion, (c) Book lungs (iii) Ctenoplana, (d) Bioluminescence (iv) Locusta
a.
(1) (iv) (i) (ii) (iii)
b.
(2) (iii) (ii) (i) (iv)
c.
(3) (ii) (i) (iii) (iv)
d.
(4) (i) (iii) (ii) (iv)
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Match the following columns: (a) Floating Ribs (i) Located between second and seventh ribs, (b) Acromion (ii) Head of the Humerus, (c) Scapula (iii) Clavicle, (d) Glenoid cavity (iv) Do not connect with the sternum
a.
(1) (i) (iii) (ii) (iv)
b.
(2) (iii) (ii) (iv) (i)
c.
(3) (iv) (iii) (i) (ii)
d.
(4) (ii) (iv) (i) (iii)
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Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action? (a) Darwin’s Finches, (b) Herbicide resistant weeds, (c) Drug resistant eukaryotes, (d) Man-created breeds of domesticated animals like dogs.
a.
(a) and (c)
b.
(b), (c) and (d)
c.
Only (d)
d.
Only (a)
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Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
a.
Darwin’s Finches of Galapagos islands.
b.
Herbicide resistant weeds.
c.
Drug resistant eukaryotes.
d.
Man-created breeds of domesticated animals like dogs.
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The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.
a.
Copper
b.
Calcium
c.
Potassium
d.
Iron
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