21- Purkinje fibres are connected with the impulse conducting system of?
A. heart
B. brain
C. skin
D. Nephron
View Answer
Answer : A. heart
Description
22- The alveoli represent total surface area of?
A. 10-30m
B. 30-60m
C. 70-90m
D. 90-110m
View Answer
Answer : C. 70-90m
Description
23- Some marine fishes possess salt excreting organs known as?
A. Thyroid gland
B. Pituitary gland
C. Adrenal gland
D. Rectal gland
View Answer
Answer : D. Rectal gland
Description
24- Tetanus is the infection of:
A. Respiratory system
B. Nervous system
C. circulatory system
D. Bones and muscles
View Answer
Answer : B. Nervous system
Description
25- ______ regulate the body temperature.
A. hypothalamus
B. thalamus
C. hippocampus
D. amygdala
View Answer
Answer : A. hypothalamus
Description
26- A man has to face interview, but during his first five minutes before the interview he experiences sweating, increased heart rate and respiration. Which hormone is responsible for his restlessness?
A. insulin and glucagon
B. adrenocorticotropic hormone
C. epinephrine and norepinephrine
D. aldosterone
View Answer
Answer : C. epinephrine and norepinephrine
Description
27- Hypothalamus connected to pituitary gland via:
A. nerves
B. infundibulum
C. blood
D. no connection
View Answer
Answer : B. infundibulum
Description
28- Second meiotic division in oocyte is completed:
A. When oocyte is fertilized by sperm
B. When ovum is discharged from the ovary
C. Just before fertilization
D. before the onset of menstruation
View Answer
Answer : A. When oocyte is fertilized by sperm
Description
29- Do not make so much noise, Farrah ______ to study for her ESL test!
A. Try
B. tries
C. tried
D. Is trying
View Answer
Answer : D. Is trying
Description
30- Zara changed the flat tire. [Choose the correct voice]
A. The flat tire was changed by Zara
B. The flat tire is changed by Zara
C. The flat tire has been changed by Zara
D. The flat tire had changed by Zara
View Answer
Answer : A. The flat tire was changed by Zara
Description
31- Which one of the following is not a state function?
A. Work
B. Enthalpy
C. Internal energy
D. Pressure
View Answer
Answer : A. Work
Description
32- How many elements are there in the third period of the periodic table?
A. 8
B. 10
C. 18
D. 32
View Answer
Answer : A. 8
Description
33- The number of isomers of pentane is:
A. 2
B. 3
C. 4
D. 5
View Answer
Answer : B. 3
Description
34- When ammonium cyanide (NH₄CN) salt is dissolved in water the solution will be?
A. acidic
B. basic
C. Neutral
D. both acidic and basic
View Answer
Answer : B. basic
Description
35- The enzyme which is found in saliva, accelerates the conversion of starch into sugar is?
A. thrombin
B. pepsin
C. ptyalin
D. fumarase
View Answer
Answer : C. ptyalin
Description
36- Consider the reversible reaction, N₂+3H₂ ⇌ 2NH₃ + Heat. The yield of NH₃ will be maximum at:
A. High temperature and low pressure
B. High temperature and high pressure
C. Low temperature and low pressure
D. Low temperature and high pressure
View Answer
Answer : D. Low temperature and high pressure
Description
37- The viscous drag on small spherical body (moving with slow speed v) is proportional to:
A. v
B. square root of v
C. 1/square root of v
D. v²
View Answer
Answer : A. v
Description
38- The transverse nature of light is shown by:
A. Interference of light
B. Refraction of light
C. Polarization of light
D. Dispersion of light
View Answer
Answer : C. Polarization of light
Description
39- An electron is moving along the axis of a solenoid carrying a current. Which of the following is a correct statement about the magnetic force acting on the electron?
