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 biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Choose the wrong enzymatic reaction. 

  1. Sucrose $\overset{Invertase}{\rightarrow}$ Glucose + Fructose
  2. Lactose $\overset{Lactase}{\rightarrow}$ Glucose + Fructose
  3. Pepsinogen $\overset{HCI}{\rightarrow}$ Pepsin
  4. Maltose $\overset{Maltase}{\rightarrow}$ Glucose + Glucose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct answer is (b).

Multiple choice evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

Mark the correct statement

  1. Sugar inhibits the growth of bacteria which enhances the activity of enzymes

  2. Sugar inhibits the growth of microbes which inhibits the growth of bacteria that spoil food

  3. Sugar reduces the rate of enzyme activity

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jams, jellies, squashes are preserved by sugar. Sugar reduces the moisture content which inhibits the growth of bacteria which spoils food.

Multiple choice evs experiments with water water and its types hard and soft water what floats - what sinks

Which of the following is/are soluble in water?

  1. Ghee

  2. Curd

  3. Blood

  4. Sugar
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation
Sucrose or sugar is a polar compound which can break the H-bond present in water due to this reason sugar can dissolve in water . 
Blood is a colloid or suspension composing red blood cells floating in a liquid plasma.If we add it to water, the plasma disperses in the water, becoming more dilute.
Oil and ghee are non-polar in nature as a result they can't interact with a polar solvent like water hence they are insoluble in water.

Multiple choice biology biotechnology and genetic engineering stds and infertility gm crops biotechnology

Secondary metabolite is

  1. Sugar

  2. Glucose

  3. Antibiotics

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

Secondary metabolites, including antibiotics, are produced in nature and serve survival functions for the organisms producing them. Secondary metabolites serve: (i) as competitive weapons used against other bacteria, fungi, amoebae, plants, insects, and large animals; (ii) as metal transporting agents; (iii) as agents of symbiosis between microbes and plants, nematodes, insects, and higher animals; (iv) as sexual hormones; and (v) as differentiation effectors. Although antibiotics are not obligatory for sporulation, some secondary metabolites (including antibiotics) stimulate spore formation and inhibit or stimulate germination.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Which one of the following statements about glycogen is correct?

  1. It is a disaccharides stored in liver which can react with ammonia to form proteins

  2. It is synthesized in the liver and takes part in the formation of bile and lipase, besides being a source of energy

  3. It is a polysaccharide which is synthesized and stored in liver cells

  4. It is synthesized in blood and stored in liver and muscles to provide glucose in tomes of need
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glycogen is a branched polysaccharide of glucose molecules that serves as the primary short-term energy storage carbohydrate in animals, being abundantly synthesized and stored in liver and muscle cells.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

The food stored in the liver is in the form of

  1. Albumen

  2. Glucose

  3. Glycogen

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

Once glucose is inside the liver, glucose is phosphorylated into glucose-6-phosphate, or G6P. G6P is further metabolized into triglycerides, fatty acids, glycogen or energy. Glycogen is the form in which the body stores glucose. The liver can only store about 100 g of glucose in the form of glycogen. 

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Statement 1: Blood sugar level falls rapidly after hepatectomy.


Statement 2: The glycogen of the liver is the principal source of blood sugar in case of an emergency.

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • In the liver, Glycogen a reserve food material is changed into glucose(sugar) (by gluconeogenesis) and released into the blood. when hepatectomy(surgical removal of the liver) is done it leads to rapid fall of blood sugar. Hence Blood sugar level falls rapidly after hepatectomy is a correct statement.
  • During emergency conditions, the liver can convert proteins and fats i.e gluconeogenesis. Hence The glycogen of the liver is the principal source of blood sugar in case of emergency.is an incorrect statement
  • So, the correct answer is 'Statement 1 is correct but statement 2 is incorrect'.
Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Glycogenesis refers to

  1. Conversion of glycogen to glucose.

  2. Breakdown of glucose to form pyruvate.

  3. Breakdown of pyruvate to form glucose.

  4. Conversion of glucose to glycogen.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glycogenesis is the process of glycogen synthesis, in which glucose molecules are added to chains of glycogen for storage. This process is activated during rest periods following the Cori cycle, in the liver, and also activated by insulin in response to high glucose levels. Mostly glycogenesis occurs in the liver.

Multiple choice

What is the name of the sugar formed during photosynthesis?

  1. fructose

  2. glucose

  3. lactose

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

Photosynthesis produces glucose (C6H12O6) as the primary energy-storing sugar. Fructose, lactose, and pentose are other types of sugars not directly produced as the main output of photosynthesis.

Multiple choice

Which protein present in silk fabric

  1. Siri sine ,fibroien

  2. Lactose

  3. Amines

  4. Melamine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Silk is primarily composed of two proteins: fibroin, which forms the structural core of the fiber, and sericin, which acts as a sticky material surrounding the fibers.