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.
Iron
b.
Copper
c.
Calcium
d.
Potassium
Correct Answer
Step-by-Step AI Explanation
Verified Method
Potassium is crucial for enzyme activation, glucose metabolism, and maintaining resting membrane potential in neurons.
Q44mcq
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.
Iron
b.
Copper
c.
Calcium
d.
Potassium
Correct Answer
Step-by-Step AI Explanation
Verified Method
Potassium (K+) is essential for enzymatic activation, ATP production during respiration, and maintaining the resting membrane potential in nerve transmission.
Q91mcq
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.
only (a)
b.
(a) and (c)
c.
(b), (c) and (d)
Correct Answer
d.
only (d)
Step-by-Step AI Explanation
Verified Method
Anthropogenic actions like herbicide use (b), drug use (c), and artificial selection/breeding (d) lead to evolution. Darwin's finches (a) are an example of natural adaptive radiation.
Q91mcq
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.
a.
only (a)
b.
(a) and (c)
c.
(b), (c) and (d)
Correct Answer
d.
only (d)
Step-by-Step AI Explanation
Verified Method
Anthropogenic action refers to human-induced changes. Herbicide resistance, drug resistance, and selective breeding (domestication) are examples of evolution resulting from human activity, unlike Darwin's Finches which evolved due to natural geographic isolation.
Q92mcq
Match the following columns and select the correct option.
a.
(ii) (iii) (i) (iv)
b.
(iii) (i) (iv) (ii)
c.
(iv) (ii) (i) (iii)
Correct Answer
d.
(i) (ii) (iv) (iii)
Step-by-Step AI Explanation
Verified Method
Organ of Corti is on basilar membrane (a-iv). Cochlea is the coiled part (b-ii). Eustachian tube connects ear and pharynx (c-i). Stapes is attached to the oval window (d-iii).
Q92mcq
Match the following columns and select the correct option.
Column-I: (a) Organ of Corti, (b) Cochlea, (c) Eustachian tube, (d) Stapes
Column-II: (i) Connects middle ear and pharynx, (ii) Coiled part of the labyrinth, (iii) Attached to the oval window, (iv) Located on the basilar membrane
a.
(1) (ii) (iii) (i) (iv)
b.
(2) (iii) (i) (iv) (ii)
c.
(3) (iv) (ii) (i) (iii)
Correct Answer
d.
(4) (i) (ii) (iv) (iii)
Step-by-Step AI Explanation
Verified Method
Organ of Corti is on the basilar membrane (a-iv). Cochlea is the coiled part (b-ii). Eustachian tube connects middle ear and pharynx (c-i). Stapes is attached to the oval window (d-iii).
Q93mcq
Identify the wrong statement with reference to immunity.
a.
When exposed to antigen (living or dead) antibodies are produced in the host’s body. It is called “Active immunity”.
b.
When ready-made antibodies are directly given, it is called “Passive immunity”.
c.
Active immunity is quick and gives full response.
Correct Answer
d.
Foetus receives some antibodies from mother, it is an example for passive immunity.
Step-by-Step AI Explanation
Verified Method
Active immunity is slow and takes time to give its full effective response, whereas passive immunity provides immediate relief.
Q94mcq
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.
(a) and (b)
Correct Answer
b.
(c) and (d)
c.
(a), (b) and (d)
d.
only (d)
Step-by-Step AI Explanation
Verified Method
Inspiration is initiated by the contraction of the diaphragm and external inter-costal muscles, which increases the pulmonary volume and decreases the intra-pulmonary pressure.
Q95mcq
The oxygenation activity of RuBisCo enzyme in photorespiration leads to the formation of
a.
2 molecules of 3-C compound
b.
1 molecule of 3-C compound
Correct Answer
c.
1 molecule of 6-C compound
d.
1 molecule of 4-C compound and 1 molecule of 2-C compound
Step-by-Step AI Explanation
Verified Method
In photorespiration, RuBisCo acts as an oxygenase, converting RuBP into one molecule of 3-phosphoglycerate (3-C compound) and one molecule of phosphoglycolate (2-C compound).
Q96mcq
The infectious stage of Plasmodium that enters the human body is
a.
Trophozoites
b.
Sporozoites
Correct Answer
c.
Female gametocytes
d.
Male gametocytes
Step-by-Step AI Explanation
Verified Method
The sporozoite is the infective form of Plasmodium that enters the human body via the bite of an infected female Anopheles mosquito.
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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) only
b.
(a), (b) and (c)
c.
(c) and (d)
d.
(a) and (d)
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Match the following columns and select the correct option.
Column-I (a) Floating Ribs (b) Acromion (c) Scapula (d) Glenoid cavity
Column-II (i) Located between second and seventh ribs (ii) Head of the Humerus (iii) Clavicle (iv) Do not connect with the sternum
a.
(ii) (iv) (i) (iii)
b.
(i) (iii) (ii) (iv)
c.
(iii) (ii) (iv) (i)
d.
(iv) (iii) (i) (ii)
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Match the following diseases with the causative organism and select the correct option.
Column-I (a) Typhoid (b) Pneumonia (c) Filariasis (d) Malaria
Column-II (i) Wuchereria (ii) Plasmodium (iii) Salmonella (iv) Haemophilus
a.
(i) (iii) (ii) (iv)
b.
(iii) (iv) (i) (ii)
c.
(ii) (i) (iii) (iv)
d.
(iv) (i) (ii) (iii)
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Match the following concerning essential elements and their functions in plants
(a) Iron (b) Zinc (c) Boron (d) Manganese
(i) Photolysis of water (ii) Pollen germination (iii) Required for chlorophyll biosynthesis (iv) IAA biosynthesis
a.
(ii) (i) (iv) (iii)
b.
(iv) (iii) (ii) (i)
c.
(iii) (iv) (ii) (i)
d.
(iv) (i) (ii) (iii)
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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.
(1) (ii) (i) (iv) (iii)
b.
(2) (iv) (iii) (ii) (i)
c.
(3) (iii) (iv) (ii) (i)
d.
(4) (iv) (i) (ii) (iii)
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Match the following with respect to meiosis:
(a) Zygotene (i) Terminalization
(b) Pachytene (ii) Chiasmata
(c) Diplotene (iii) Crossing over
(d) Diakinesis (iv) Synapsis
a.
(1) (iii) (iv) (i) (ii)
b.
(2) (iv) (iii) (ii) (i)
c.
(3) (i) (ii) (iv) (iii)
d.
(4) (ii) (iv) (iii) (i)
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Match the following columns and select the correct option.
Column-I Column-II
(a) Bt cotton (i) Gene therapy
(b) Adenosine deaminase deficiency (ii) Cellular defence
(c) RNAi (iii) Detection of HIV infection
(d) PCR (iv) Bacillus thuringiensis
a.
(1) (iv) (i) (ii) (iii)
b.
(2) (iii) (ii) (i) (iv)
c.
(3) (ii) (iii) (iv) (i)
d.
(4) (i) (ii) (iii) (iv)
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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) (ii) (iii) (iv) (i)
b.
(2) (iii) (iv) (i) (ii)
c.
(3) (iv) (ii) (iii) (i)
d.
(4) (i) (iv) (iii) (ii)
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Match the organism with its use in biotechnology.
(a) Bacillus thuringiensis (i) Cloning vector
(b) Thermus aquaticus (ii) Construction of first rDNA molecule
(c) Agrobacterium tumefaciens (iii) DNA polymerase
(d) Salmonella typhimurium (iv) Cry proteins
a.
(1) (ii) (iv) (iii) (i)
b.
(2) (iv) (iii) (i) (ii)
c.
(3) (iii) (ii) (iv) (i)
d.
(4) (iii) (iv) (i) (ii)
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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.
(d) and (c)
b.
(c) and (a)
c.
(a) and (b)
d.
(b) and (c)
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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.
(1) (ii) (iii) (iv) (i)
b.
(2) (iii) (ii) (i) (iv)
c.
(3) (iv) (iii) (ii) (i)
d.
(4) (i) (ii) (iii) (iv)
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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.
(1) (ii) (iii) (iv) (i)
b.
(2) (iii) (ii) (i) (iv)
c.
(3) (iv) (iii) (ii) (i)
d.
(4) (i) (ii) (iii) (iv)
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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 stem
b.
Monocotyledonous root
c.
Dicotyledonous stem
d.
Dicotyledonous root
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Match the following columns and select the correct option. Column-I (a) Gregarious, polyphagous pest (b) Adult with radial symmetry and larva with bilateral symmetry (c) Book lungs (d) Bioluminescence. Column-II (i) Asterias (ii) Scorpion (iii) Ctenoplana (iv) Locusta
a.
(1) (i) (iii) (ii) (iv)
b.
(2) (iv) (i) (ii) (iii)
c.
(3) (iii) (ii) (i) (iv)
d.
(4) (ii) (i) (iii) (iv)
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Match the following columns and select the correct option. Column - I (a) Eosinophils (b) Basophils (c) Neutrophils (d) Lymphocytes. Column - II (i) Immune response (ii) Phagocytosis (iii) Release histaminase, destructive enzymes (iv) Release granules containing histamine
a.
(1) (iii) (iv) (ii) (i)
b.
(2) (iv) (i) (ii) (iii)
c.
(3) (i) (ii) (iv) (iii)
d.
(4) (ii) (i) (iii) (iv)
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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.
2.0 meters
b.
2.5 meters
c.
2.2 meters
d.
2.7 meters
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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.
2.0 meters
b.
2.5 meters
c.
2.2 meters
d.
2.7 meters
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Match the following columns and select the correct option.
Column-I: (a) Placenta, (b) Zona pellucida, (c) Bulbo-urethral glands, (d) Leydig cells
Column-II: (i) Androgens, (ii) Human Chorionic Gonadotropin (hCG), (iii) Layer of the ovum, (iv) Lubrication of the Penis
a.
(1) (iv) (iii) (i) (ii)
b.
(2) (i) (iv) (ii) (iii)
c.
(3) (iii) (ii) (iv) (i)
d.
(4) (ii) (iii) (iv) (i)
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