Biology · Chemistry

Carbohydrates and Biomolecules

986 Questions

Carbohydrates and biomolecules questions test your understanding of sugars, monosaccharides, and metabolic substrates. The topic covers food transportation in plants and the biochemical properties of sweeteners. Practicing these questions builds a strong foundation for exam preparation.

Disaccharides and monosaccharidesArtificial sweetenersGlycogen storagePlant food transportGlycoprotein hormones

Carbohydrates and Biomolecules Questions

Multiple choice bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

Column I contains some terms and Column II contains their
meanings. Match them properly and choose the right answer

Column I Colunn II
A Glycogenesis 1 Conversion of glycogen toglucose
B Glycosuria 2 Conversion of glucose toglycogen
C Gluconeogenesis 3 Excretion of glucose in urine
D Glycogenolysis 4 Conversion ofnoncarbohydrate sources toglucose
5 Conversion of glucose tostarch













  1. A-1, B - 2, C - 3, D - 4

  2. A - 2, B - 3, C - 4, D -1

  3. A - 2, B - L C - 3, D -4

  4. A -1, B - 5, C - 2, D -4
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glycogenesis is glucose to glycogen (A-2). Glycosuria is glucose in urine (B-3). Gluconeogenesis is non-carbohydrate to glucose (C-4). Glycogenolysis is glycogen to glucose (D-1).

Multiple choice evs structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

Fill the blank
Sugar + Plaque $\rightarrow$ 

  1. Starch

  2. Enamel

  3. Acids

  4. Microbes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Plaque is a soft, sticky film that builds up on your teeth and contains millions of bacteria. 
  • When you eat, the bacteria in plaque use the sugars in your food to produce acids that eat away at the tooth enamel. Hence, Sugar + Plaque → acids.
So, the correct answer is 'acids'. 

Multiple choice evs nutritious food diseases caused by changes in lifestyle nutrition deficiency diseases study of ecological pyramids

.......... is another polysaccharide found in animals including human beings.

  1. Sucrose

  2. Mannose

  3. Starch

  4. Glycogen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In animals, the structurally similar glucose polymer is the more densely branched glycogen, sometimes called "animal starch". Glycogen's properties allow it to be metabolized more quickly, which suits the active lives of moving animals.


So, the correct option is 'Glycogen'.

Multiple choice bio-chemistry lipids derived lipids biomolecules: chemical constituents of living cells cell membrane

Which one of the following is not correctly matched?

  1. Cutin- Consists of long chain fatty acids and polyhydroxy derivatives of these fatty acids

  2. Pectin-Methylated polymer of flacturonic acid

  3. Lignin- Formed by condensation on coniferyl alcohol

  4. Callose- Glycosylated aliphatic acid
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Callose is a polysaccharide composed of glucose residues linked together through beta-1,3-glucosidic bonds, not a glycosylated aliphatic acid. All other listed cell wall components and their chemical natures are correctly matched.

Multiple choice evs food components energy from different food components nutritional requirements of the body need for nutrients simple test for nutrients test for nutrients

Man needs carbohydrates as a source of energy and gets these from

  1. Starch

  2. Cellulose

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbohydrates are a source of energy and primary cellular fuel. Cereals like rice, wheat, maize are a primary source of carbohydrate for man. Humans can digest starch present in cereals but not cellulose. Hence, dietary starch is broken down into glucose inside the body which provides us with energy.

Therefore, the correct answer is option A.

Multiple choice evs food components energy from different food components nutritional requirements of the body need for nutrients simple test for nutrients test for nutrients

Another substance of the category of glucose, sucrose and maltose is

  1. Myoglobin

  2. Starch

  3. Amino acids

  4. Haemoglobin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbohydrates provide us with energy. Carbohydrates can be monosaccharides (composed of one monomer unit only like glucose, fructose etc.), disaccharide (composed of two monomer units like maltose which is made up of two units of glucose; sucrose made up of one unit of glucose and one unit of fructose) or polysaccharide (made up of multiple monomer units example starch which is composed of multiple units of glucose).

Multiple choice evs food components energy from different food components nutritional requirements of the body need for nutrients simple test for nutrients test for nutrients

In mammals, carbohydrates are stored in the form of

  1. Lactic acid in muscles

  2. Glycogen in liver and muscles

  3. Glucose in liver and muscles

  4. Glycogen in liver and spleen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbohydrates can be stored in body for subsequent use. Starch is an important storage polysaccharide in plants and glycogen is an important storage polysaccharide in animals. Both starch and glycogen are homopolymers of glucose.

Multiple choice biology health and hygiene - food for living energy from different food components nutritional requirements of the body need for nutrients

The commonly used artificial sweetener is

  1. Acesulfame K

  2. Cyclamate

  3. Aspartame

  4. Saccharin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The most commonly used artificial sweetener is aspartame. It was discovered by James M. Schlatter in 1965. It is used for deserts. It is used as a sugar substitute. It is not suitable for baking, as high temperatures it breaks it into its constituent amino acid. So, the correct answer is option C.

Multiple choice zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

Which of the following is a cryoprotectant?

  1. Mannitol

  2. DMSO

  3. Ethylene oxide

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cells, tissues, semen and embryo can be preserved for longer periods at lower temperatures using cryopreservation. When the cells are frozen, there is formation of ice crystals in the cells which will rupture the cells. The cryoprotectants like DMSO (dimethylsulphoxide) prevents the formation of these crystals when the cells are stored in liquid nitrogen. 

Thus, the correct answer is option B. 

Multiple choice biomacromolecules biotechnology cell biology and biotechnology biomolecules biology

Match and choose the true option.

  1. $NaCl$ - Inorganic micromolecule
  2. ${H} _{2}O$ - Organic micromolecule

  3. Starch - Organic micromolecule

  4. Glucose - Inorganic macromolecule
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Organic molecules are made of chains of carbon atoms. Inorganic molecules are minerals like salts NaCl which held together by an ionic bond.
Water doesn't contain any carbon atom in its molecule.  So water is an inorganic compound. 
So the correct answer is A. 
Multiple choice biomacromolecules biotechnology cell biology and biotechnology biomolecules biology

If in a man, normal glucose conc. increases to 190 mg/100 ml. Which of the following will occur?

  1. Extra glucose will get deposited in form of ketone bodies.

  2. Extra glucose is changed to glycogen and get stored in liver.

  3. Extra glucose will be excreted by kidney.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The blood glucose level in body is tightly regulated by a number of mechanism. The normal blood glucose level in humans should not exceed 140 mg per decilitre after meals and is maintained between 70 to 100 mg per decilitre under fasting conditions without food. Glucose is a precious metabolite and, hence, is actively reabsorbed by the kidney tubules. Any excess quantity of glucose is converted into glycogen which is stored in liver and muscles. Any further excess is converted to fats and stored for long term deposit. In humans and most other mammals, acetyl CoA formed in the liver during oxidation of fatty acids may enter the citric acid cycle or may be converted to ketone bodies, i.e., acetoacetate, $\beta$-hydroxy-butyrate and acetone for export to other tissues. Overproduction of ketone bodies can occur in conditions of severe starvation and in uncontrolled diabetes.

Multiple choice biomacromolecules biotechnology cell biology and biotechnology biomolecules biology

Select the correct option:

Read the given statements.
i. Fructose is the sweetest sugar.
ii. Glycine is the simplest amino acid.
iii. Lactose is a disaccharide composed of one molecule each of glucose and galactose.
iv. Cellulose is an unbranched chain of glucose molecules linked by $\beta$1, 4-glycosidic bond.
Which of the given statements are correct?

  1. (i) and (ii)

  2. (iii) and (iv)

  3. (i), (ii) and (iii)

  4. (i), (ii), (iii) and (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbohydrate, on the basis of the number of molecules present, is divided into monosaccharides, disaccharide and polysaccharides. Fructose is also known as the fruit sugar and is a monosaccharide. It is a 6 carbon molecule. Glycine is the simplest amino acid as it contains hydrogen in the side chain. Lactose is a disaccharide which means it has two molecules of same or different monosaccharide units. Lactose is also known as the milk sugar. 

On hydrolysis, lactose produces glucose and galactose.
Cellulose is a polysaccharide and an important constituent of cell wall it is made up of Beta D glucose units linked by 1-4 glycosidic linkage.

So, the correct option is '(i), (ii), (iii) and (iv)'