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.
Potassium
Correct Answer
b.
Iron
c.
Copper
d.
Calcium
Step-by-Step AI Explanation
Verified Method
Potassium is the major intracellular cation, activates many enzymes, helps in cellular metabolism, and along with sodium is important in nerve impulse transmission.
Q26mcq
An element has a body centred cubic (bcc) structure with a cell edge of 288 pm. The atomic radius is:
a.
sqrt(3) × 288 pm / 4
Correct Answer
b.
sqrt(3) × 288 pm / 2
c.
sqrt(2) × 288 pm / 4
d.
sqrt(4) × 288 pm / 3
Step-by-Step AI Explanation
Verified Method
In a bcc lattice, atoms touch along the body diagonal, so 4r = sqrt(3)a. Hence r = (sqrt(3)/4)a = (sqrt(3)/4) × 288 pm.
Q44mcq
Which of the following is not correct about carbon monoxide?
a.
It is produced due to incomplete combustion.
b.
It forms carboxyhaemoglobin.
c.
It reduces oxygen carrying ability of blood.
d.
The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Carboxyhaemoglobin is more stable than oxyhaemoglobin, which is why CO is highly toxic.
Q44mcq
Which of the following is not correct about carbon monoxide?
a.
It is produced due to incomplete combustion.
b.
It forms carboxyhaemoglobin.
c.
It reduces oxygen carrying ability of blood.
d.
The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
Correct Answer
Step-by-Step AI Explanation
Verified Method
Carboxyhaemoglobin is much more stable than oxyhaemoglobin, which is why CO poisoning is dangerous.
Q45mcq
The number of protons, neutrons and electrons in 17571Lu, respectively, are:
a.
175, 104 and 71
b.
71, 104 and 71
Correct Answer
c.
104, 71 and 71
d.
71, 71 and 104
Step-by-Step AI Explanation
Verified Method
For neutral 175Lu, atomic number = 71, so protons = 71 and electrons = 71. Neutrons = 175 − 71 = 104.
Q46mcq
In water hyacinth and water lily, pollination takes place by:
a.
insects and water
Correct Answer
b.
insects or wind
c.
water currents only
d.
wind and water
Step-by-Step AI Explanation
Verified Method
Water hyacinth and water lily are hydrophilous in habitat but are pollinated by insects, not by water currents.
Q46mcq
In water hyacinth and water lily, pollination takes place by:
a.
insects and water
Correct Answer
b.
insects or wind
c.
water currents only
d.
wind and water
Step-by-Step AI Explanation
Verified Method
Water hyacinth and water lily are insect-pollinated; pollination is not by water in these cases.
Q47mcq
By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams?
a.
Inbreeding
b.
Out crossing
c.
Mutational breeding
d.
Cross breeding
Correct Answer
Step-by-Step AI Explanation
Verified Method
Hisardale was developed by crossing Bikaneri ewes with Merino rams, which is cross-breeding.
Q47mcq
By which method was a new breed 'Hisardale' of sheep formed by using Bikaneri ewes and Marino rams?
a.
Inbreeding
b.
Out crossing
c.
Mutational breeding
d.
Cross breeding
Correct Answer
Step-by-Step AI Explanation
Verified Method
Hisardale was developed by crossing Bikaneri ewes with Marino rams, which is cross breeding.
Q48mcq
Snow-blindness in Antarctic region is due to:
a.
Damage to retina caused by infra-red rays
b.
Freezing of fluids in the eye by low temperature
c.
Inflammation of cornea due to high dose of UV-B radiation
Correct Answer
d.
High reflection of light from snow
Step-by-Step AI Explanation
Verified Method
Snow blindness is caused by excessive UV-B exposure leading to inflammation of the cornea.
🎉 10 Free Sample Solutions Completed
Unlock All 117 Questions & Solutions
Sign up free in seconds to unlock step-by-step AI answers for the remaining 107 questions.
Match the following columns and select the correct option.
Column I Column II
(a) Eosinophils (i) Immune response
(b) Basophils (ii) Phagocytosis
(c) Neutrophils (iii) Release histaminase, destructive enzymes
(d) Lymphocytes (iv) Release granules containing histamine
a.
(a)(b)(c)(d) = (ii)(i)(iii)(iv)
b.
(a)(b)(c)(d) = (iii)(iv)(ii)(i)
c.
(a)(b)(c)(d) = (iv)(i)(ii)(iii)
d.
(a)(b)(c)(d) = (i)(ii)(iv)(iii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
2.7 meters
b.
2.0 meters
c.
2.5 meters
d.
2.2 meters
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
The plant parts which consist of two generations, one within the other, are:
(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) and (d)
b.
(a) only
c.
(a), (b) and (c)
d.
(c) and (d)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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 (d)
b.
only (a)
c.
(a) and (c)
d.
(b), (c) and (d)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(b) and (c)
b.
(d) and (c)
c.
(c) and (a)
d.
(a) and (b)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(b) and (c)
b.
(d) and (c)
c.
(c) and (a)
d.
(a) and (b)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(ii)(iii)(i)(iv)
b.
(ii)(iv)(iii)(i)
c.
(iii)(i)(iv)(ii)
d.
(iii)(iv)(i)(ii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(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.
(ii)(iii)(iv)(i)
b.
(iv)(iii)(i)(ii)
c.
(i)(iv)(ii)(iii)
d.
(iii)(ii)(iv)(i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
a.
(iii)(iv)(i)(ii)
b.
(ii)(iv)(iii)(i)
c.
(iv)(iii)(i)(ii)
d.
(iii)(ii)(iv)(i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(a) 6 - 15 pairs of gill slits (i) Trygon
(b) Heterocercal caudal fin (ii) Cyclostomes
(c) Air bladder (iii) Chondrichthyes
(d) Poison sting (iv) Osteichthyes
a.
(i)(iv)(iii)(ii)
b.
(ii)(iii)(iv)(i)
c.
(iii)(iv)(i)(ii)
d.
(iv)(ii)(iii)(i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(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.
(ii)(i)(iii)(iv)
b.
(i)(iii)(ii)(iv)
c.
(iv)(i)(ii)(iii)
d.
(iii)(ii)(i)(iv)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
G2 phase
b.
M phase
c.
G1 phase
d.
S phase
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(a) Pituitary gland (i) Grave's disease
(b) Thyroid gland (ii) Diabetes mellitus
(c) Adrenal gland (iii) Diabetes insipidus
(d) Pancreas (iv) Addison's disease
a.
(ii)(i)(iv)(iii)
b.
(iv)(iii)(i)(ii)
c.
(iii)(ii)(i)(iv)
d.
(iii)(i)(iv)(ii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
Dicotyledonous root
b.
Monocotyledonous stem
c.
Monocotyledonous root
d.
Dicotyledonous stem
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(iv)(iii)(i)(ii)
b.
(ii)(iv)(i)(iii)
c.
(i)(iii)(ii)(iv)
d.
(iii)(ii)(iv)(i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(iv)(i)(ii)(iii)
b.
(i)(iii)(ii)(iv)
c.
(iii)(iv)(i)(ii)
d.
(ii)(i)(iii)(iv)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(a) Organ of Corti (i) Connects middle ear and pharynx
(b) Cochlea (ii) Coiled part of the labyrinth
(c) Eustachian tube (iii) Attached to the oval window
(d) Stapes (iv) Located on the basilar membrane
a.
(a) (b) (c) (d) = (i) (ii) (iv) (iii)
b.
(a) (b) (c) (d) = (ii) (iii) (i) (iv)
c.
(a) (b) (c) (d) = (iii) (i) (iv) (ii)
d.
(a) (b) (c) (d) = (iv) (ii) (i) (iii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
Match the following columns and select the correct option.
Column I Column II
(a) Organ of Corti (i) Connects middle ear and pharynx
(b) Cochlea (ii) Coiled part of the labyrinth
(c) Eustachian tube (iii) Attached to the oval window
(d) Stapes (iv) Located on the basilar membrane
a.
(i)(ii)(iv)(iii)
b.
(ii)(iii)(i)(iv)
c.
(iii)(i)(iv)(ii)
d.
(iv)(ii)(i)(iii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(a) (b) (c) (d) = (i) (ii) (iii) (iv)
b.
(a) (b) (c) (d) = (iv) (i) (ii) (iii)
c.
(a) (b) (c) (d) = (iii) (ii) (i) (iv)
d.
(a) (b) (c) (d) = (ii) (iii) (iv) (i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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
Select the correct option:
a.
(a) (b) (c) (d) = (iv) (i) (ii) (iii)
b.
(a) (b) (c) (d) = (ii) (i) (iv) (iii)
c.
(a) (b) (c) (d) = (iv) (iii) (ii) (i)
d.
(a) (b) (c) (d) = (iii) (iv) (ii) (i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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) (b) (c) (d)
a.
(i) (ii) (iii) (iv)
b.
(ii) (iii) (iv) (i)
c.
(iii) (ii) (i) (iv)
d.
(iv) (iii) (ii) (i)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
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.
(ii) (iv) (iii) (i)
b.
(iii) (iv) (i) (ii)
c.
(iv) (iii) (ii) (i)
d.
(i) (ii) (iv) (iii)
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
