61- This muscle controls the diameter of your blood vessels:
A. Smooth muscles
B. Striated muscles
C. Cardiac muscles
D. Skeletal muscles
View Answer
Answer : A. Smooth muscles
Description
62- When Mendel crossed together two contrasting homozygous individuals, the phenotype of the hybrid in the F1 cross appeared to be that of:
A. Recessive parent
B. Dominant parent
C. Indifferent
D. Half dominant & recessive
View Answer
Answer : B. Dominant parent
Description
63- If a dihybrid cross is made between Pisum sativum plants producing Yellow/Round and Green/Wrinkled seeds, the results of the F2 generation show:
Yellow/Round = 9/16
Yellow/Wrinkled = 3/16
Green/Round = 3/16
Green/Wrinkled = 1/16
Which ratios of these results confirm that independent assortment had taken place?
A. 9/16
B. 1/16
C. 3/16
D. 3/16 & 3/16
View Answer
Answer : D. 3/16 & 3/16
Description
64- An orthopedic specialist observed the X-ray of the joint of a patient and detected hardening of the cartilage due to excess calcium deposit. Consequently, the joint was very stiff and crippled the patient. What was the patient suffering from?
A. Disc slip
B. Spondylosis
C. Arthritis
D. Sciatica
View Answer
Answer : C. Arthritis
Description
65- Which of the following is a disease in which the blood fails to clot?
A. Colour blindness
B. Haemophilia
C. Diabetics
D. Alkaptonuria
View Answer
Answer : B. Haemophilia
Description
66- In human beings, multiple alleles control the inheritance of:
A. Blood groups
B. Phenylketonuria
C. Colour blindness
D. Sickle cell anemia
View Answer
Answer : A. Blood groups
Description
67- Polygenic inheritance forms the basis of:
A. Codominance
B. Incomplete dominance
C. Continuous variation
D. Discontinuous variation
View Answer
Answer : C. Continuous variation
Description
68- Mr. X & Mrs. X have the same genotype for blood group. What is the expected probability of the blood group of their children?
A. Blood Group ‘A’ = 1.00, Blood Group ‘O’ = 0.00
B. Blood Group ‘A’ = 0.75, Blood Group ‘O’ = 0.25
C. Blood Group ‘A’ = 0.50, Blood Group ‘O’ = 0.50
D. Blood Group ‘A’ = 0.25, Blood Group ‘O’ = 0.75
View Answer
Answer : B. Blood Group 'A' = 0.75, Blood Group 'O' = 0.25
Description
69- Which of the following reactions can be used for the conversion of ethyl alcohol into acetaldehyde?
A. Polymerization
B. Dehydrogenation
C. Esterification
D. Reduction
View Answer
Answer : B. Dehydrogenation
Description
70- Which of the following is formed when excess ethyl alcohol is treated with concentrated H2SO4 at a low temperature?
A. Diethyl ether
B. Dimethyl ether
C. Ethene
D. Acetylene
View Answer
Answer : A. Diethyl ether
Description
71- Which of the following will give an iodoform reaction on treatment with Na2CO3 & I2?
A. Methanol
B. Acetic acid
C. Acetic anhydride
D. Acetone
View Answer
Answer : D. Acetone
Description
72- Which of the following is formed when formaldehyde is treated with an oxidizing mixture (H2SO4 + K2Cr2O7)?
A. Methanol
B. Methanoic acid
C. Acetone
D. Acetaldehyde
View Answer
Answer : B. Methanoic acid
Description
73- Dry distillation of which of the following can be done to produce acetone?
A. Calcium acetate
B. Calcium formate
C. Ethyl acetate
D. Acetic acid
View Answer
Answer : A. Calcium acetate
Description
74- The elimination between alkyl halides and a strong base takes place by two mechanisms—E1 and E2. How many steps are involved in each one of these?
A. E1 elimination is two steps & E2 is one step
B. E1 & E2 both take place in one step
C. E1 & E2 both take place in two steps
D. E1 elimination is one step & E2 is two steps
View Answer
Answer : A. E1 elimination is two steps & E2 is one step
Description
75- Which of the following is an example of a tertiary alkyl halide?
A. 2-chlorobutane
B. 1-chloromethyl pentane
C. 2-bromo-3-methyl butane
D. 2-bromo-2-methyl butane
View Answer
Answer : D. 2-bromo-2-methyl butane
Description
76- The radius of the first orbit of hydrogen is 0.53 Å. Which orbit has a radius of 4.77 Å?
A. First
B. Second
C. Third
D. Fourth
View Answer
Answer : C. Third
Description
77- Which of the following has only one orientation in space in the magnetic field?
A. p orbital
B. s orbital
C. d orbital
D. f orbital
View Answer
Answer : B. s orbital
Description
78- What's the mass of one proton?
A. Equal to 1836 electrons
B. Equal to a positron
C. Equal to an electron
D. Equal to 1836 neutrons
View Answer
Answer : A. Equal to 1836 electrons
Description
79- Which of the following is different in Na+ (Z=11), Mg^+2 (Z=12) and Al^+3 (Z=13)?
