Dobson units are used to measure thickness of:
1. Ozone
2. Troposphere
3. CFCs
4. Stratosphere

Subtopic:  Ozone Layer Depletion |
 90%
Level 1: 80%+
NEET - 2021
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The organelles that are included in the endomembrane system are:

1.  Golgi complex, Mitochondria, Ribosomes, and Lysosomes
2. Golgi complex, Endoplasmic reticulum, Mitochondria, and Lysosomes
3. The endoplasmic reticulum, Mitochondria, Ribosomes, and Lysosomes
4. The endoplasmic reticulum, Golgi complex, Lysosomes, and Vacuoles

Subtopic:  Endomembrane System |
 88%
Level 1: 80%+
NEET - 2021
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Which of the following RNAs is not required for the synthesis of protein?

1. rRNA 2. siRNA
3. mRNA 4. tRNA
Subtopic:  Transcription |
 89%
Level 1: 80%+
NEET - 2021
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Match List-I with List-II

List-I List-II
(a) Metamerism (i) Coelenterata
(b) Canal system (ii) Ctenophora
(c) Comb Plates (iii) Annelida
(d) Cnidoblasts (iv) Porifera

Choose the correct answer from the options given below:

Options: (a) (b) (c) (d)
1. iii iv ii i
2. iv i ii iii
3. iv iii i ii
4. iii iv i ii
Subtopic:  Phylum Porifera | Phylum Coelenterata | Phylum Ctenophora | Phylum Annelida |
 84%
Level 1: 80%+
NEET - 2021
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Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?

1. Diakinesis

2. Pachytene

3. Leptotene

4. Zygotene

Subtopic:  Cell Cycle: Meiosis I |
 90%
Level 1: 80%+
NEET - 2021
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Persons with 'AB' blood group are called as "Universal recipients". This is due to:

1. Presence of antibodies, anti-A and anti-B, on RBCs.
2. Absence of antibodies, anti-A and anti-B, in plasma.
3. Absence of antigens A and B on the surface of RBCs.
4. Absence of antigens A and B in plasma.
Subtopic:  Blood: Blood Group (A,B,O) |
 74%
Level 2: 60%+
NEET - 2021
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The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :

1. pO2 = 95 and pCO2 = 40

2. pO2 = 159 and pCO2 = 0.3

3. pO2 = 104 and pCO2 = 40

4. pO2 = 40 and pCO2 = 45

Subtopic:  Respiratory System: Exchange of Gases |
 79%
Level 2: 60%+
NEET - 2021
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Succus entericus is referred to as:

1. Gastric juice

2. Chyme

3. Pancreatic juice

4. Intestinal juice

Subtopic:  Intestinal Secretions |  DIGESTION OF FOOD |
 81%
Level 1: 80%+
NEET - 2021
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Receptors for sperm binding in mammals are present on:

1. Perivitelline space  2. Zona pellucida
3. Corona Radiata 4. Vitelline membrane
Subtopic:  Fertilization |
 82%
Level 1: 80%+
NEET - 2021
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Match the following

List-I List-II
(a) Physalia i. Pearl oyster
(b) Limulus ii. Portuguese Man of War
(c) Ancylostoma iii. Living fossil
(d) Pinctada iv. Hookworm

Choose the correct answer from the options given below:

Options: (a) (b) (c) (d)
1. ii iii iv i
2. i iv iii ii
3. ii iii i iv
4. iv i iii ii
Subtopic:  Phylum Coelenterata | Phylum Aschelminthes | Phylum Arthropoda | Phylum Mollusca |
 88%
Level 1: 80%+
NEET - 2021
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