In human blood the oxygen carrier is

In human blood, the oxygen carrier is Options (a) Iron (b) Meth-haemoglobin (c) Haemocyanin (d) Haemoglobin Correct Answer: Haemoglobin Explanation: Haemoglobin, an iron containing red pigment is responsible for transport of O₂ and CO₂ in […]

Epithelial tissue performs the following functions

Epithelial tissue performs the following functions Options (a) Protection, secretion, absorption, respiration (b) Protection, secretion, sensatoin, absorption (c) Protection, secretion, absorption, digestion (d) None of these Correct Answer: Protection, secretion, sensatoin, absorption Explanation: Epithelial tissues […]

Dental formula of rabbit is

Dental formula of rabbit is Options (a) 1023/1023 (b) 3023/3023 (c) 1023/2023 (d) 2033/1023 Correct Answer: 2033/1023 Explanation: Dental formula of Rabbit is (2033/1023) × 2 = 16/12 = 28

The reactive species in the nitration of benzene is

The reactive species in the nitration of benzene is Options (a) NO₃ (b) NHO₃ (c) NO₂⁺ (d) NO₂⁻ Correct Answer: NO₂⁺ Explanation: Nitronium ion (NO₂⁺) is an electrophile that actually attacks on the benzene ring.

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