NEET Test 33

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NEET Test 33

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Weekly Quiz Competition

Question 1
4 / -1

The atomic number of an element is 35. What is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

A
17

B
11

C
23

D
6

Solution

It is given that Z=35, then electronic configuration will be 1s² 2s² 2p⁶3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

So, the number of electrons in p orbital= 6 × 2 + 5 = 17
Question 2
4 / -1

The mass of 6.4 L of a gas is 12g. What is the relative molecular mass?

A
42u

B
48u

C
40u

D
None of the above

Solution

6.4 L of gas at STP weighs 12g.

22.4 L of gas at STP weighs (12 × 22.4)/6.4= 42u
Question 3
4 / -1

What will happen if die secretion of parietal cells of gastric glands is blocked with an inhibitor?

A
Gastric juice will be deficient in chymosin

B
Gastric juice will be deficient in pepsinogen

C
in the absence of HCI secretion, inactive pepsinogen is not converted into the active enzyme pepsin

D
Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin

Solution

gastric glands are formed by the epithelium of stomach. The parietal cells or oxyntic cells are meant to secrete hydrochloric acid which kills the bacteria present in bolus and provide the acidic medium which is needed for the conversion of pepsinogen and prorennin to pepsin and rennin respectively.
Question 4
4 / -1

Which of the following enzymes carries out the initial step in the digestion of milk in human adults?

A
Rennin

B
Lipase

C
Trypsin

D
Pepsin

Solution

The initial step in the digestion of milk in human adult is carried out by pepsin. It is an active protein digesting enzyme that acts on milk protein caseinogen and forms soluble ‘casein’ which further gets digested enzymatically. Rennin is responsible for digesting milk protein only in infants and not adults.
Question 5
4 / -1

Which of the following options best represents the enzyme composition of pancreatic juice?

A
Amylase, pepsin, trypsinogen, maltase

B
Peptidase, amylase, pepsin, rennin

C
Lipase, amylase; trypsinogen, procarboxypeptidase

D
Amylase, peptidase, trypsinogen, rennin

Solution

Pancreatic juice comprises of lipase, amylase, trypsinogen, procarboxypeptidase. Pepsin and rennin are present in gastric juices.
Question 6
4 / -1

Gastric juice 'of infants contains

A
maltase, pepsinogen, rennin

B
nuclease, pepsinogen, lipase

C
pepsinogen, lipase, rennin

D
amylase, rennin, pepsinogen

Solution

Alongwith pepsinogen and lipase, gastric juice of infants also contain enzyme renin which helps in the digestion of milk proteins.
Question 7
4 / -1

A young infant may be feeding entirely on mother's milk, which is white in colour but the stools, which the infant passes out is quite yellowish. What is this yellow colour due to?

A
Intestinal juice

B
Bile pigments passed through bile juice

C
Undigested milk protein casein

D
Pancreatic juice poured into duodenum

Solution

The yellow color in the stools of the infant is quite yellowish when bile pigments from the bile juice are passed on. The yellowish color comes from the digestive juices, bile and gut bacteria in infants.
Question 8
4 / -1

Anxiety and eating spicy food together in an otherwise normal human, may lead to

A
Indigestion

B
jaundice

C
Diarrhoea

D
vomiting

Solution

Indigestion occurs after overeating, eating spicy food etc. The secretion of digestive juices becomes improper leading to indigestion. Anxiety while eating spicy food leads to indigestion, vomiting, growling stomach, nausea etc.
Question 9
4 / -1

Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

A
Perikaryon and dendrites

B
Vacuoles and fibres

C
Flagellum and medullary sheath

D
Nucleus and mitochondria

Solution

Perikaryon is the cell body of the neuron(nerve cell) , containing the nucleus . Dendrites are the short branched extension of nerve cell , along which impulses are received from other cells at synapses.
Question 10
4 / -1

Myelin sheath is produced by:

A
Astrocytes and Schwann cells

B
Oligodendrocytes and Osteoclasts

C
Osteoclasts and Astrocytes

D
Schwann cells and Oligodendrocytes

Solution

Myelin sheath wrapped around the nerve axon. Oligodendrocytes are neuroglial cells which produce myelin sheath in central nervous system while Schwann cell produces myelin sheath in peripheral nervous system.
Question 11
4 / -1

Injury to vagus nerve in human is not likely to affect:

A
tongue movements

B
gastrointestinal movements

C
pancreatic secretion

D
cardiac movements

Solution

Vagus nerve is a mixed cranial nerve, which controls the gut, ventilatory system and heart. It has no affect on tongue movements, tongue movement is controlled by glossopharyngeal nerve.
Question 12
4 / -1

In a n-type semiconductor, which of the following statement is true :

A
Electron are minority carriers and pentavalent atoms are dopants.

B
Holes are minority carriers and pentavalent atoms are dopants.

C
Holes are majority carriers and trivalent atoms are dopants.

D
Electrons are majority carriers and trivalent atoms are dopants.

Solution

when pentavalent impurity such as silicon (Si), having four valence electrons, needs to be doped as a n-type semiconductor, elements from group V like phosphorus (P) or arsenic (As) can be used because they have five valence electrons. A dopant with five valence electrons is also called a pentavalent impurity.
Question 13
4 / -1

The resistances of the four arms P, Q, R and S in a Wheatstone’s bridge are 10 ohm, 30 ohm, 30 ohm and 90 ohm, respectively. The e.m.f. and internal resistance of the cell are 7 Volt and 5 ohm respectively. If the galvanometer resistance is 50 ohm, the current drawn from the cell will be :

A
0.2 A

B
0.1 A

C
2.0 A

D
1.0 A

Solution

For balanced Wheatstone’s bridge P/Q = R/S so terminals of galvanometer will be at same potential no current will flow through it.
Net resistance of the circuit is given by
40x120/40+120 = 30 Ω
I = E/R + r
= 7/30+5 = .2 A

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NEET Test 33

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NEET Test 33

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SHARING IS CARING

Question 1

17

11

23

6

Solution

Question 2

42u

48u

40u

None of the above

Solution

Question 3

Gastric juice will be deficient in chymosin

Gastric juice will be deficient in pepsinogen

in the absence of HCI secretion, inactive pepsinogen is not converted into the active enzyme pepsin

Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin

Solution

Question 4

Rennin

Lipase

Trypsin

Pepsin

Solution

Question 5

Amylase, pepsin, trypsinogen, maltase

Peptidase, amylase, pepsin, rennin

Lipase, amylase; trypsinogen, procarboxypeptidase

Amylase, peptidase, trypsinogen, rennin

Solution

Question 6

maltase, pepsinogen, rennin

nuclease, pepsinogen, lipase

pepsinogen, lipase, rennin

amylase, rennin, pepsinogen

Solution

Question 7

Intestinal juice

Bile pigments passed through bile juice

Undigested milk protein casein

Pancreatic juice poured into duodenum

Solution

Question 8

Indigestion

jaundice

Diarrhoea

vomiting

Solution

Question 9

Perikaryon and dendrites

Vacuoles and fibres

Flagellum and medullary sheath

Nucleus and mitochondria

Solution

Question 10

Astrocytes and Schwann cells

Oligodendrocytes and Osteoclasts

Osteoclasts and Astrocytes

Schwann cells and Oligodendrocytes

Solution

Question 11

tongue movements

gastrointestinal movements

pancreatic secretion

cardiac movements

Solution

Question 12

Electron are minority carriers and pentavalent atoms are dopants.

Holes are minority carriers and pentavalent atoms are dopants.

Holes are majority carriers and trivalent atoms are dopants.

Electrons are majority carriers and trivalent atoms are dopants.

Solution