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Biomolecules

NEET 2018MCQEasy📈 Topic in 12% papers+4−1
Ques. 1NEET 2018

The difference between amylose and amylopectin is

  1. amylopectin have 1 4 -linkage and 1 6 -linkage
  2. amylose have 1 4 -linkage and 1 6 -linkage
  3. amylopectin have 1 4 -linkage and 1 6 -linkage
  4. amylose is made up of glucose and galactose

Answer

(1) amylopectin have 1 4 -linkage and 1 6 -linkage

Solution

As per NCERT, amylose is a long unbranched chain of α-D-(+)-glucose units held by C1–C4 glycosidic linkage.

Amylopectin is a branched chain polymer of α-D-glucose units in which the chain is formed by C1–C4 glycosidic linkage, whereas branching occurs by C1–C6 glycosidic linkage.

Amylopectin has 1 4 and 1 6 linkages.

Answer: (1)

Keep practising — Biomolecules

Ques. 2NEET 2018

Which of the following compounds can form a zwitter ion?

  1. Aniline
  2. Acetanilide
  3. Benzoic acid
  4. Glycine
Ques. 3NEET 2017

Which of the following statements is not correct?

  1. Ovalbumin is a simple food reserve in egg-white.
  2. Blood proteins thrombin and fibrinogen are involved in blood clotting.
  3. Denaturation makes the proteins more active.
  4. Insulin maintains sugar level in the blood of a human body.
Ques. 4NEET 2016 (Phase 1)

The correct statement regarding RNA and DNA, respectively is

  1. The sugar component in RNA is arabinose and the sugar component in DNA is ribose
  2. The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose
  3. The sugar component in RNA is arabinose and the sugar component in DNA is 2'-deoxyribose
  4. The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose.
Ques. 5NEET 2016 (Phase 1)

In a protein molecule various amino acids are linked together by

  1. peptide bond
  2. dative bond
  3. -glycosidic bond
  4. -glycosidic bond.
Ques. 6NEET 2016 (Phase 1)

Which one given below is a non-reducing sugar?

  1. Glucose
  2. Sucrose
  3. Maltose
  4. Lactose
Ques. 7NEET 2016 (Phase 2)

The central dogma of molecular genetics states that the genetic information flows from

  1. Amino acids Proteins DNA
  2. DNA Carbohydrates Proteins
  3. DNA RNA Proteins
  4. DNA RNA Carbohydrates
Ques. 8NEET 2016 (Phase 2)

The correct corresponding order of names of four aldoses with configuration given below [figure] respectively, is

  1. L-erythrose, L-threose, L-erythrose, D-threose
  2. D-threose, D-erythrose, L-threose, L-erythrose
  3. L-erythrose, L-threose, D-erythrose, D-threose
  4. D-erythrose, D-threose, L-erythrose, L-threose
Ques. 9AIPMT 2014

Which of the following hormones is produced under the condition of stress which stimulate glycogenolysis in the liver of human beings?

  1. Thyroxine
  2. Insulin
  3. Adrenaline
  4. Estradiol
Ques. 10AIPMT 2014

D(+)-glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11NEET 2013 (Karnataka)

In DNA, the linkages between different nitrogenous bases are

  1. phosphate linkage
  2. H-bonding
  3. glycosidic linkage
  4. peptide linkage

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