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.
Correct Answer
c.
Drug resistant eukaryotes.
d.
Man-created breeds of domesticated animals like dogs.
Step-by-Step AI Explanation
Verified Method
Anthropogenic environmental changes select for herbicide-resistant weeds and drug-resistant organisms. Darwin’s finches evolved by natural selection, not human-induced change, and domesticated breeds are products of artificial selection rather than evolution due to environmental change.
Q2mcq
Meiotic division of the secondary oocyte is completed:
a.
At the time of copulation
b.
After zygote formation
c.
At the time of fusion of a sperm with an ovum
Correct Answer
d.
Prior to ovulation
Step-by-Step AI Explanation
Verified Method
The secondary oocyte is arrested at metaphase II and completes meiosis II only after sperm entry, i.e. at fertilisation.
Q3mcq
Which of the following is correct about viroids?
a.
They have free RNA without protein coat.
Correct Answer
b.
They have DNA with protein coat.
c.
They have free DNA without protein coat.
d.
They have RNA with protein coat.
Step-by-Step AI Explanation
Verified Method
Viroids are naked, infectious RNA molecules; they do not have a protein coat.
Q4mcq
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
Correct Answer
d.
Embryo sac inside the ovule
Step-by-Step AI Explanation
Verified Method
A seed contains the embryo of the next generation within the fruit of the parent plant, so it represents one generation enclosed within another.
Q5mcq
Experimental verification of the chromosomal theory of inheritance was done by:
a.
Sutton
b.
Boveri
c.
Morgan
Correct Answer
d.
Mendel
Step-by-Step AI Explanation
Verified Method
T.H. Morgan experimentally verified the chromosomal theory of inheritance through his work on Drosophila.
Q5mcq
Experimental verification of the chromosomal theory of inheritance was done by:
a.
Sutton
b.
Boveri
c.
Morgan
Correct Answer
d.
Mendel
Step-by-Step AI Explanation
Verified Method
T. H. Morgan experimentally verified the chromosomal theory of inheritance through his work on Drosophila.
Q6mcq
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 is a unicellular green alga and Spirulina is a cyanobacterium commonly treated in this context as a unicellular photosynthetic organism. The other pairs are multicellular or colonial forms.
Q6mcq
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 is a unicellular green alga and Spirulina is a cyanobacterium commonly grouped with unicellular algal forms in such questions.
Q7mcq
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
a.
Growth response
b.
Defence action
Correct Answer
c.
Effect on reproduction
d.
Nutritive value
Step-by-Step AI Explanation
Verified Method
These secondary metabolites mainly act as protective compounds against herbivores and pathogens.
Q7mcq
Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:
a.
Growth response
b.
Defence action
Correct Answer
c.
Effect on reproduction
d.
Nutritive value
Step-by-Step AI Explanation
Verified Method
These alkaloids act mainly as defensive compounds against herbivores and pathogens.
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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.
(iii)(iv)(i)(ii)
b.
(ii)(i)(iii)(iv)
c.
(iv)(i)(ii)(iii)
d.
(i)(iii)(ii)(iv)
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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 is present throughout 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:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
Choose the correct option from the following:
(a)(b)(c)(d)
a.
(iii)(i)(iv)(ii)
b.
(iii)(iv)(i)(ii)
c.
(ii)(iii)(i)(iv)
d.
(ii)(iv)(iii)(i)
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Match the following:
(a) Inhibitor of catalytic activity
(b) Possess peptide bonds
(c) Cell wall material in fungi
(d) Secondary metabolite
Choose the correct option from the following.
a.
(iii)(i)(iv)(ii)
b.
(iii)(iv)(i)(ii)
c.
(ii)(iii)(i)(iv)
d.
(ii)(iv)(iii)(i)
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Some dividing cells exit the cell cycle and enter the vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of:
a.
G1 phase
b.
S phase
c.
G2 phase
d.
M phase
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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 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
Select the correct option:
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 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
Select the correct option:
a.
(iv)(iii)(ii)(i)
b.
(iii)(iv)(ii)(i)
c.
(iv)(i)(ii)(iii)
d.
(ii)(i)(iv)(iii)
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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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Match the following columns and select the correct option.
Column I Column II
(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.
(i)(iii)(ii)(iv)
b.
(iii)(ii)(iv)(i)
c.
(iv)(iii)(i)(ii)
d.
(ii)(iv)(i)(iii)
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Match the organism with its use in biotechnology.
(a) Bacillus thuringiensis
(b) Thermus aquaticus
(c) Agrobacterium tumefaciens
(d) Salmonella typhimurium
Select the correct option from the following:
(i) Cloning vector
(ii) Construction of first rDNA molecule
(iii) DNA polymerase
(iv) Cry proteins
a.
(iv)(iii)(i)(ii)
b.
(iii)(ii)(iv)(i)
c.
(iii)(iv)(i)(ii)
d.
(ii)(iv)(iii)(i)
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Match the organism with its use in biotechnology. Select the correct option from the following:
(a) Bacillus thuringiensis
(b) Thermus aquaticus
(c) Agrobacterium tumefaciens
(d) Salmonella typhimurium
a.
(iv)(iii)(i)(ii)
b.
(iii)(ii)(iv)(i)
c.
(iii)(iv)(i)(ii)
d.
(ii)(iv)(iii)(i)
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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.
(iv)(i)(ii)(iii)
b.
(iii)(ii)(i)(iv)
c.
(ii)(i)(iii)(iv)
d.
(i)(iii)(ii)(iv)
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Match the following with respect to meiosis and select the correct option.
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis
Column II:
(i) Terminalization
(ii) Chiasmata
(iii) Crossing over
(iv) Synapsis
a.
(iv)(iii)(ii)(i)
b.
(i)(ii)(iv)(iii)
c.
(ii)(iv)(iii)(i)
d.
(iii)(iv)(i)(ii)
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Match the following with respect to meiosis:
(a) Zygotene
(b) Pachytene
(c) Diplotene
(d) Diakinesis
Select the correct option from the following:
(a)(b)(c)(d)
a.
(iv)(iii)(ii)(i)
b.
(i)(ii)(iv)(iii)
c.
(ii)(iv)(iii)(i)
d.
(iii)(iv)(i)(ii)
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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.
(iv)(i)(ii)(iii)
b.
(i)(ii)(iv)(iii)
c.
(ii)(i)(iii)(iv)
d.
(iii)(iv)(ii)(i)
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The transverse section of a plant shows the 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) Placenta
(b) Zona pellucida
(c) Bulbo-urethral glands
(d) Leydig cells
a.
(i)(iv)(ii)(iii)
b.
(iii)(ii)(iv)(i)
c.
(ii)(iii)(iv)(i)
d.
(iv)(iii)(i)(ii)
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Match the following columns and select the correct option.
Column I / Column II
(a) 6–15 pairs of gill slits
(b) Heterocercal caudal fin
(c) Air bladder
(d) Poison sting
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 trophic levels with their correct species examples in grassland ecosystem.
(a) Fourth trophic level
(b) Second trophic level
(c) First trophic level
(d) Third trophic level
Select the correct option:
a.
(iii)(ii)(i)(iv)
b.
(iv)(iii)(ii)(i)
c.
(i)(ii)(iii)(iv)
d.
(ii)(iii)(iv)(i)
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Match the trophic levels with their correct species examples in grassland ecosystem.
(a) Fourth trophic level
(b) Second trophic level
(c) First trophic level
(d) Third trophic level
(i) Crow
(ii) Vulture
(iii) Rabbit
(iv) Grass
Select the correct option:
a.
(iii)(ii)(i)(iv)
b.
(iv)(iii)(ii)(i)
c.
(i)(ii)(iii)(iv)
d.
(ii)(iii)(iv)(i)
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