Class 9 Biology Chapter 2 MCQ. We covered all the Class 9 Biology Chapter 2 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Biology for 9th Class Students
In the blind spot of the human eye
(A) both cones and rods are absent
(B) only cones are absent
(C) both rods and cones are present
(D) only rods are absent
Option a – both cones and rods are absent
Which is the CORRECT chronological sequence of Human evolution?
(A) Ramapithecus → Australopithecines → Homo erectus → Neanderthal man → Homo sapiens
(B) Ramapithecus – Homo habilis → Homo sapiens → Homo erectus
(C) Australopithecines → Ramapithecus → Homo habilis → Homo sapiens
(D) Homo habilis → Australopithecines → Homo erectus → Homo sapiens
Option a – Ramapithecus → Australopithecines → Homo erectus → Neanderthal man → Homo sapiens
Natural cannabinoids are obtained from the inflorescence of the plant
(A) Cannabis sativa
(B) Atropa belladonna
(C) Datura
(D) Papaver somniferum
Option a – Cannabis sativa
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
(A) 0.16 (AA); 0.48 (Aa); 0.36 (aa)
(B) 0.16 (AA); 0.36 (Aa); 0.48 (aa)
(C) 0.36 (AA); 0.48 (Aa); 0.16 (aa)
(D) 0.16 (AA); 0.24 (Aa); 0.36 (aa)
Option a – 0.16 (AA); 0.48 (Aa); 0.36 (aa)
The Taq polymerase enzyme is obtained from
(A) Bacillus subtilis
(B) Pseudomonas putida
(C) Thermus aquaticus
(D) Thiobacillus ferrooxidans
Option c – Thermus aquaticus
(A) physiological
(B) cellular
(C) physical
(D) cytokine
Option d – cytokine
Which one of these animals is NOT a homeotherm?
(A) Camelus
(B) Chelone
(C) Macropus
(D) Psittacula
Option b – Chelone
Read the following statements and choose the correct option. Statement I: The cells lining the villi in the small intestine have microscopic projections called microvilli. Statement II: Microscopic microvilli increase the surface area of absorption enormously.
(A) Statement I is correct, and II is wrong.
(B) Statements I and II both are wrong.
(C) Both statements are correct.
(D) Statement II is correct, and I is wrong.
Option c – Both statements are correct.
Select the CORRECT statement from the ones given below.
(A) Barbiturates, when given to criminals, make them tell the truth.
(B) Morphine is often given to persons, who have undergone surgery, as a pain killer.
(C) Chewing tobacco lowers blood pressure and heart rate.
(D) Cocaine is given to patents after surgery as it stimulates recovery.
Option a – Barbiturates, when given to criminals, make them tell the truth.
The stirrer is provided with a rotating shaft and blades for
(A) proper foam control
(B) proper mixing
(C) control of temperature
(D) control of pH
Option b – proper mixing
Which of the following statements is correct with reference to a test tube baby?
(A) Fertilization of the egg is affected outside the body; the fertilized egg is then placed in the womb of the mother where the gestation is completed.
(B) Fertilization of the egg is affected in the female genital tract. It is then taken out and grown in a large test tube.
(C) A prematurely born baby is reared in an incubator.
(D) Fertilization of the egg and growth of the embryo are affected in a large test tube
Option a – Fertilization of the egg is affected outside the body; the fertilized egg is then placed in the womb of the mother where the gestation is completed.
Which of the following sexually transmitted diseases do NOT specifically affect reproductive organs?
(A) Chlamydiasis and AIDS
(B) Genital warts and Hepatitis-B
(C) Syphilis and Genital herpes
(D) AIDS and Hepatitis B
Option d – AIDS and Hepatitis B
Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs
(A) as bicarbonate ions
(B) in the form of dissolved gas molecules
(C) by binding of RBC
(D) as carbaminohaemoglobin
Option a – as bicarbonate ions
Which of the following animals are TRUE coelomates with bilateral symmetry?
(A) Annelids
(B) Adult Echinoderms
(C) Aschelminthes
(D) Platyhelminthes
Option a – Annelids
Which one of the following items gives its correct total number?
(A) Types of diabetes-3
(B) Cervical vertebrae in humans-8
(C) Floating ribs in humans-4
(D) Amino acids found in proteins-16
Option c – Floating ribs in humans-4
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
(A) Relaxin – Gigantism
(B) Prolactin – Cretinism
(C) Parathyroid hormone – Tetany
(D) Insulin – Diabetes insipidus
Option c – Parathyroid hormone – Tetany
The hormone relaxin, responsible for easy birth of the baby is secreted by ……….
(A) Graafian follicle
(B) Corpus callosum
(C) Corpus luteum
(D) Corpus Albicans
Option c – Corpus luteum
How was the ‘new’ variety of Indian Basmati developed by the American company?
(A) Indian variety was continuously self-pollinated.
(B) Indian variety was crossed with pure-dwarf varieties.
(C) Indian Variety Variety was crossed with pure-tall variety.
(D) Indian variety was crossed with semi-dwarf varieties.
Option d – Indian variety was crossed with semi-dwarf varieties.
In human adult females oxytocin
(A) stimulates the pituitary to secrete vasopressin
(B) causes strong uterine contractions during parturition
(C) is secreted by the anterior pituitary
(D) stimulates the growth of mammary glands.
Option b – causes strong uterine contractions during parturition
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