Biomolecules · Chemistry · COMEDK
MCQ (Single Correct Answer)
Given are 4 statements related to the chemical properties of Glucose.
Identify the two incorrect statements from the following.
A. It reacts with $$\mathrm{Br}_2$$ (aq) to form Saccharic acid.
B. Reacts with Acetic anhydride to form Glucose tetraacetate.
C. Reacts with Hydroxylamine to give Glucose oxime.
D. It reacts with ammoniacal $$\mathrm{AgNO}_3$$ to form ammonium salt of Gluconic acid with deposition of silver.
Two statements, Assertion and Reason are given. Choose the correct option from the following.
Assertion: In the secondary structure of RNA, double helix structure is formed.
Reason: In the double structure of RNA, two nucleic acid chains are wound about each other and held together by hydrogen bonds between pairs of bases
Match the Vitamins given in Column I with the diseases caused by their deficiency as given in Column II.
| Vitamin | Deficiency | ||
|---|---|---|---|
| (A) | K | (P) | Cheilosis |
| (B) | B$$_12$$ | (Q) | Osteomalacia |
| (C) | B$$_2$$ | (R) | Permicious Anaemia |
| (D) | D | (S) | Haemophilia |
Identify the 2 chemical tests which is not answered by Glucose having an open chain structure
[A] Reaction with Schiff's reagent and with Sodium bisulphite
[B] Reaction with $$\mathrm{HCN}$$ and with $$\mathrm{HI}$$
[C] Reaction with $$\mathrm{HNO}_3$$ and with Acetic anhydride
[D] Reaction with aqueous Bromine and with Hydroxylamine
Match the Hormones listed in Column I with their characteristics listed in Column II
| No. | Hormone | No. | Characteristics |
|---|---|---|---|
| A | Adrenal Cortex | P | Mediates responses to external stimuli. |
| B | Epinephrine | Q | Steroid hormone. |
| C | Estrogen | R | Iodinated derivative of Tyrosine amino acid. |
| D | Throxine | S | Its malfunction causes Addison's disease. |
Given below are 4 statements about Insulin. Which of these statement/(s) is/are correct?
[A] Insulin is a globular protein consisting of 51 Amino acids.
[B] Insulin is constituted of 3 polypeptide chains linked together.
[C] Insulin is constituted of 2 polypeptide chains linked together by disulphide bonds.
[D] The 3 polypeptide chains in Insulin are linked together by Hydrogen bonding.
Which of the following hexoses will form the same osazone when treated with excess phenyl hydrazine?
Pick out the incorrect statement(s) from the following.
1. Glucose exists in two different crystalline forms, $$\alpha$$-D-glucose and $$\beta$$-D-glucose.
2. $$\alpha$$-D-glucose and $$\beta$$-D-glucose are anomers.
3. $$\alpha$$-D-glucose and $$\beta$$-D-glucose are enantiomers.
4. Cellulose is a straight chain polysaccharide made of only $$\beta$$-D-glucose units.
5. Starch is a mixture of amylase and amylopectin, both contain unbranched chain of $$\alpha$$-D-glucose units.
Which one of the following is an important component of chlorophyll?
One among the 4 Vitamins belonging to $$\mathrm{B}$$ Complex, can be stored in our body. Identify the Vitamin.
Choose the incorrect statement regarding Cellulose.
What is the function platelets?
The monosaccharides of maltose is
The essential amino acids are
(i) Leucine (ii) Glutamic acid (iii) Asparagine (iv) Valine
correct option is
On treatment of glucose with bromine water the product formed is
Which of the following vitamin is responsible for Beri-Beri disease?
Carbon monoxide is poisonous to human beings because
Which one of the following sets of monosaccharides forms sucrose?
Which of the following amino acid (NH$$_2$$CHRCOOH) contains polar R group?
Among the following enzymes, which one is involved in the given below catalytic reaction?
$${C_6}{H_{12}}{O_6}(aq) \to 2{C_2}{H_5}OH(aq) + 2C{O_2}(g)$$
Xerophthalmia disease causes by which deficiency of vitamin?
The amino acid which is not optically active is