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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1301. |
In aqueous solution amino acids moslty exit asA. `NH_(2)-CHR-CO OH`B. `NH_(2)-CHR-CO O^(-)`C. `overset(+)(N)H_(3)CHRCO OH`D. `H_(3)N^(+) CHRCO O^(-)` |
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Answer» Correct Answer - D In aqueous solution , amino afcids mostly exists as zwitter ion. `underset("Zwitter ion")(overset(N)(N)H_(3)-overset(R)overset(|)(CH)-CO O^(-))` |
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| 1302. |
Vitamin B2 is also known as ………. (a) Riboflavin(b) Thiamine (c) Nicotinamide (d) Pyridoxine |
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Answer» (a) Riboflavin |
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| 1303. |
The number of sp2 and sp3 hybridised carbon in fructose are respectively …… (a) 1 and 4 (b) 4 and 2 (c) 5 and 1 (d) 1 and 5 |
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Answer» (d) 1 and 5 |
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| 1304. |
In aqueous solution of amino acids mostly exists in ………(a) NH2 – CH(R) – COOH(b) NH2 – CH(R) – COO(c) H3N – CH(R) – COOH (d) H3N+ – CH(R) – COO- |
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Answer» (d) H3N+ – CH(R) – COO- |
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| 1305. |
The correct statement regarding RNA and DNA respectively is …..(a) the sugar component in RNA is an arabinose and the sugar component in DNA is ribose(b) the sugar component in RNA is 2’ – deoxyribose and the sugar component in DNA is arabinose (c) the sugar component in RNA is an arabinose and the sugar component in DNA is 2’ – deoxyribose (d) the sugar component in RNA is ribose and the sugar component in DNA is 2’-deoxyribose |
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Answer» (d) the sugar component in RNA is ribose and the sugar component in DNA is 2’ – deoxyribose |
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| 1306. |
Define the following terms. 1. Nucleotide 2. Anomers 3. Essential amino acids |
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Answer» 1. Nucleotide: It is the monomer unit of DNA which is formed by a nitrogenous base, deoxyribose sugar and phosphoric acid. 2. Anomers: Anomers are cyclic monosaccharides which are differing from each other in the configuration of C – 1 if it is an aldose or in the configuration at C – 2 if it is a ketose. 3. Essential amino acids: The amino acids cannot be synthesised by the body and are essential for the body. |
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| 1307. |
Which one of the following is not produced by body?(a) DNA (b) Enzymes (c) Hormones (d) Vitamins |
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Answer» (d) Vitamins |
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| 1308. |
What are essential and non-essential amino acids? Give one example of each type. |
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Answer» 1. Essential amino acids: Amino acids which are not synthesised by the human body are called essential amino acids. Example – Valine, Leucinc. 2. Non – essential amino acids: Amino acids which are synthesised by human body are called non – essential amino acids. Example – Glycine, Aspartic acid, etc. |
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| 1309. |
Assertion (A) Deoxyribose, `C_(5)H_(10)O_(4)` is not a carbohydrate. Reason (R) Carbohydrates are hydrates of carbon so compounds which follow `C_(x)(H_(2)O)_(y)` formula are carbohydrates.A. Assertion and reason both are correct statements and reason explains the assertion.B. Both assertion and reason are wrong statements.C. Assertion is correct statement and reason is wrong statement.D. Assertion is wrong statement and reason is correct statement. |
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Answer» Correct Answer - B Correct assertion. Deoxyribose `C_(5)H_(10)O_(4)` is a carbohydrate. Correct reason. Carbohydrates are hydrates are hydrates of carbon. But all carbohydrates may not be the hydrates of carbon. |
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| 1310. |
The sugar which is not a disaccharide in the following is :A. LactoseB. GalactoseC. SucroseD. Maltose |
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Answer» Correct Answer - B Galactose is a mono saccharide. |
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| 1311. |
Which compound can exist in a dipolar state? (a) C6H5CH2CH (N = CH2) COOH (b) (CH3)2 CH – CH (NH2) COOH (c) C6H5CONH CH2COOH (d) HOOC – CH2 – CH2 – CO – COOH |
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Answer» (b) (CH3)2CH – CH (NH2) COOH |
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| 1312. |
Assertion (A) Glycine must be taken through diet. Reason (R) It is an essential amino acid.A. Assertion and reason both are correct statements and reason explains the assertion.B. Both assertion and reason are wrong statements.C. Assertion is correct statement and reason is wrong statement.D. Assertion is wrong statement and reason is correct statement. |
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Answer» Correct Answer - B Correct assertion. Glycine is synthesised in the body. Correct reason. Glycine is a non-essential amino acid. |
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| 1313. |
Haemoglobin is ……… (a) an enzyme (b) a globular protein (c) a vitamin (d) carbohydrate |
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Answer» (b) a globular protein |
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| 1314. |
Dipeptide isA. structure of two peptide bondsB. two amino acids linked by one peptide bondC. Bond between one amino acid and one peptideD. None |
| Answer» Correct Answer - B | |
| 1315. |
What is the effect of denaturaion on the structure of proteins? |
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Answer» During the denaturation process, 2° and 3° structure of proteins are destroyed by 1° structure remains intact. For example: curdling of milk. |
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| 1316. |
The number of essential amino acid in man is …………(a) 8 (b) 10 (c) 20 (d) 18 |
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Answer» The number of essential amino acid in man is 10. |
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| 1317. |
What are essential and non-essential amino acids? Give two examples of each type. |
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Answer» Essential amino acids: Amino acids which cannot be synthesised in the body and must be obtained through regular diet are known as esential amino acids. Foe example: Valine, Leucine. Non – essential amino acids: The amino acids which can be synthesised in the body by itself are known as non – essential amino acids. For example: glycine, alanine. |
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| 1318. |
Assertion(A): Glycine must be taken through diet. Reason (R): It is an essential amino acid. (a) Both A and R are correct and R explains A. (b) Both A and R are correct but R does not explain A. (c) A is wrong but R is correct. (d) Both A and R are wrong. |
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Answer» (d) Both A and R are wrong. |
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| 1319. |
Which of the following is not an essential amino acid? (a) Valine (b) Lysinc (c) Histidine (d) Glycine |
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Answer» Glycine is not an essential amino acid |
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| 1320. |
Which of the following is known as broad spectrum antibiotic?A. StreptomycinB. AmpicillinC. ChloramphenicolD. Penicillin |
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Answer» Correct Answer - C Chloramphenicol is a broad spectrum antibiotic. |
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| 1321. |
Detergents are prepared by the action of `H_(2) SO_(4)` followed by neutralization by starting withA. CholesterolB. LaurylalchoholC. CyclohexanolD. p-Nitrophenol |
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Answer» Correct Answer - B Sod. Laury1 sulphate is detergent. |
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| 1322. |
An emzyme extract when subject to electric field, Sepatrated into two fractions each catalysing the same reaction. These fractins areA. allsoteric enzymeB. isoenzymeC. apoenzymeD. activator |
| Answer» Correct Answer - B | |
| 1323. |
Tyrosin containsA. alcoholic OH groupB. phenolic OH groupC. aldehyde groupD. ketonic group |
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Answer» Correct Answer - B |
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| 1324. |
What is copolymerisation give two examples. |
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Answer» Correct Answer - Copolymerisation `rarr` in which a mixture of more than one monomeric species is allowed to polymerise and form a copolymer. Example (i) Buna-S (ii) Buna-N Copolymerisation `rarr` in which a mixture of more than one monomeric species is allowed to polymerise and form a copolymer. Example (i) Buna-S (ii) Buna-N |
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| 1325. |
The partial structure of neoprene, a polymer is given below. Identify the monomer unit. . |
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Answer» Correct Answer - `CH_(2)=overset(overset(Cl)(|))(C)-CH=CH_(2)`. `CH_(2)=overset(overset(Cl)(|))(C)-CH=CH_(2)`. |
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| 1326. |
A polymer on ozonolysis gives 2,5 hexanedione only.Henece ,the monomer of the polymer would be :A. B. C. D. |
| Answer» Correct Answer - a | |
| 1327. |
The sugar present in `DNA` is :A. GlucoseB. DeoxyriboseC. RiboseD. Fructose |
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Answer» Correct Answer - B Deoxyribose is present in `DNA` and Ribose is present in `RNA`. |
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| 1328. |
Define the rate of chemical process and how is it expressed? |
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Answer» Rate of a physical or chemical process refers to the amount of product formed per unit time. It is expressed as rate = δP/δT |
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| 1329. |
What is the rule of thumb in the variation of rate? |
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Answer» Rate doubles or decreases by half in either direction for every 10°C change in temperature. |
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| 1330. |
Nicotinamide is named forA. vit-`B_2`B. vit-`B_5`C. vit-`B_6`D. vit-`B_(12)` |
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Answer» Correct Answer - B |
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| 1331. |
Hormones which regulate metabolism of lipids, carbohydrates and protein isA. epinephrineB. thyroxinC. oxtocinD. estrone |
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Answer» Correct Answer - B |
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| 1332. |
Thymine isA. nitrogenase, cytochromesB. carboxy peptidase, haemoglobinC. haemocyanin, nitrogenaseD. haemoglobin, cytochromes |
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Answer» Correct Answer - D Haemoglobin and cytochromes are both conjugated proteins containing haeme (containing Fe) as the prosthetic group. |
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| 1333. |
Compounds of biological systems which actuate chemical reactions are |
| Answer» Enzymes catalyses biological reactions. | |
| 1334. |
Protein gives blue colour withA. Benedict reagentB. iodine solutionC. NinhydrinD. Biuret reagent |
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Answer» Correct Answer - C When protein is boiled with a dilute solution of ninhydrin (triketo hydrindin), a blue colour is produced Protein + Ninhydrin solution `oversetDelta to` Blue colour. |
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| 1335. |
The formula of fat isA. `{:(CH_2O-CO-C_16H_31),(|),(CHO-CO-C_16H_31),(|),(CH_2O-CO-C_16H_31):}`B. `{:(CH_2O-CO-C_17H_33),(|),(CHO-CO-C_17H_33),(|),(CH_2O-CO-C_17H_33):}`C. `{:(CH_2O-CO-C_17H_35),(|),(CHO-CO-C_17H_35),(|),(CH_2O-CO-C_17H_35):}`D. `{:(CH_2O-CO-C_15H_29),(|),(CHO-CO-C_15H_29),(|),(CH_2O-CO-C_15H_29):}` |
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Answer» Correct Answer - C Fats are triester of saturated higher carboxylic acid with glycerol. Choices (a), (b) and (d) are triesters of unsaturated acids. `therefore` (c) which is triester of saturated fatty acid with glycerol is fat. |
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| 1336. |
Give the name of two acidic amino acids. |
| Answer» Glutamic acid, Aspartic acid | |
| 1337. |
Glucose has functional groupA. aldehydicB. aldehydic and alcoholicC. alcoholicD. ketonic and alcoholic |
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Answer» Correct Answer - B `underset"Glucose"({:(CH_2,-,CH,-,CH,-,CH,-,CH,-,CHO),("|",,"|",,"|",,"|",,"|",,),(OH,,OH,,OH,,OH,,OH,,):})` `therefore` Glucose has alcohol and aldehyde as functional groups. |
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| 1338. |
Insulin contains :(a) 51 amino acids (b) 151 amino acids (c) 15 amino acids (d) 115 amino acids |
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Answer» Option : (a) 51 amino acids |
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| 1339. |
Lactose on hydrolysis producesA. `beta`-D-glucose and `beta`-D-galactoseB. `alpha`-D-glucose and `alpha`-D-galactoseC. `beta`-D-glucose and `alpha`-D-galactoseD. |
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Answer» Correct Answer - A |
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| 1340. |
The amino acids are the end-products of the digestion ofA. lipidsB. fatsC. proteinsD. hormones |
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Answer» Correct Answer - C Amino acids are the end products of hydrolysis of proteins. |
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| 1341. |
Which of the following is a disaccharide?A. GlucoseB. RiboloseC. LactoseD. Arabinose |
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Answer» Correct Answer - C lactose is a disaccharide. Its formula is `C_12H_22O_11`. On hydrolysis it gives glucose and galactose. |
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| 1342. |
Amylopectin is :(a) soluble in water and constitutes about 80% of starch (b) insoluble in water and constitutes about 80% of starch (c) Soluble in alcohol and constitutes about 60% of starch(d) in soluble in alcohol and constitutes about 60% of starch |
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Answer» Option : (b) insoluble in water and constitutes about 80% of starch |
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| 1343. |
Give the name of two conjugated protiens. |
| Answer» Lipoprotein, nucleoprotein | |
| 1344. |
Lactose on hydrolysis gives :(a) glucose + glucose (b) glucose + fructose (c) glucose + galactose (d) fructose + galactose |
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Answer» Option : (c) glucose + galactose |
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| 1345. |
Fat consists ofA. monohydroxy carboxylic acidB. monohydroxy aliphatic carboxylic acidC. monohydroxy, aliphatic, saturated carboxylic acidD. dihydroxy aliphatic carboxylic acid |
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Answer» Correct Answer - C Fat consist of monohydroxy, aliphatic, saturated carboxylic acid (where a chain has more than 12 C atoms.) |
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| 1346. |
Naturally acurring glucose is : (a) dextro rotatory (b) laevo rotatory (c) racemic mixture (d) all of these |
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Answer» Option : (a) dextro rotatory |
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| 1347. |
Which is the most stable anomer of glucose? |
| Answer» Correct Answer - `beta`-form | |
| 1348. |
An `alpha`- helix is the example of which type of protein structure ?A. Primary structureB. secondary structureC. tertiarry structureD. quaternary structure |
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Answer» Correct Answer - B helix structure refers to secondary structure of proteins. |
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| 1349. |
Fats are ester ofA. sugarB. glycerolC. tributyrineD. polypeptide |
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Answer» Correct Answer - B Oil and fats are glyceride ester of higher carboxylic acids. e.g. palmitin. `{:(CH_2OCOC_15H_31),(|),(CHOCOC_15H_31),(|),(underset"Palmitin (fat)"(CH_2OCOC_15H_31)):}` |
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| 1350. |
Which of the following contains nitrogen?A. ProteinsB. FatsC. OilsD. Carbohydrates |
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Answer» Correct Answer - A Proteins contain nitrogen. Nitrogen is present.in amino acid which is a major constituent of protein. |
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