Biology · Chemistry

Carbohydrates and Biomolecules

1,073 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 health and diseases non-infectious diseases non infectious diseases categories of diseases

Use of artificial sweetener saccharin has been discontinued because it is

  1. Carcinogenic

  2. Liable to decompose in hot weather of tropics

  3. Bitter in the beginning

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

Saccharin is a artificial sweetener. It is thermostable and remains inert at high temperature. It was discovered in 1879. It helps to control weight and its good for diabetes patients. It was used as sugar substitute in place of sucrose. It has been discontinued because it was considered a carcinogenic agent by FDA.

So, the correct answer is option A.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Glyoxysomes are useful in

  1. Converting sugars to fats

  2. Converting fats to sugars

  3. Deamination and converting amino acids to fatty acids

  4. Amination and changing fatty acids to amino acids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Glyoxysomes are a type of peroxisomes found in plants and few filamentous fungi.
  • They are particularly found in fat storage tissues of germinating seeds (peanuts, soybeans etc.) in plants.
  • It helps in fatty acid oxidation, glyoxylate cycle and gluconeogenesis.
  • They contain enzymes (citrate synthase, isocitrate lyase and malate synthase etc.) which are responsible for beta-oxidation of fatty.
  • It also contains enzymes which produce intermediate products for the synthesis of sugars by gluconeogenesis.
  • So, the correct answer is 'Converting fats to sugars'.
Multiple choice

What does NSC stand for?

  1. Nitrogen Standard Calculation

  2. Nonstructural Carbohydrates

  3. Nitrogen Substitute Calories

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

In dairy nutrition, NSC stands for Nonstructural Carbohydrates. These include sugars, starches, and pectins, which are highly fermentable energy sources.

Multiple choice bio-chemistry food through digestive tract absorption of food absorption parts of the digestive system: structure and function

Which of the following is the most rapidly transported monosaccharide into the bloodstream from the intestine?

  1. Mannose

  2. Glucose

  3. Galactose

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

Transportation of galactose is most rapid as it attaches with sodium ion and easily dragged by the protein carries so it is very easy to transport it while glucose and fructose require energy to transport as they are transported by active transport.

So the correct option is 'Galactose'.

Multiple choice bio-chemistry food through digestive tract absorption of food absorption parts of the digestive system: structure and function

Which of the following electrolyte pumps helps in active absorption of glucose in the intestinal walls?

  1. Sodium

  2. Potassium

  3. Chloride

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

Active absorption occurs against the concentration gradient which requires energy. $Na^+$ which transports by facilitated transport that means it is taken by a protein carrier which has a peculiarity. It drags glucose with sodium ion from the lumen of the intestine to blood and helps in its absorption.

So the correct option is 'Sodium'.

Multiple choice bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

Which of the following is true regarding the absorption mechanism of carbohydrates in the intestine?

  1. Glucose is absorbed passively

  2. Galactose is absorbed passively

  3. Fructose is transported actively

  4. Glucose and galactose are transported actively
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glucose and galactose transport against the concentration and hence require energy and carrier which transport them from lumen of the intestine to cell and are co transported with sodium ion.

So the correct option is 'Glucose and galactose are transported actively'

Multiple choice chemistry mix and separate different types of mixtures homogenous and heterogenous mixtures all about mixtures

 Which one is true solution :

  1. sugar sol

  2. Blood

  3. starch

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

True Solution is a homogeneous mixture of two or more substances in which substance dissolved (solute) in solvent has the particle size of less than 10-9 m or 1 nm. Simple solution of sugar in water is an example of true solution. Particles of true solution cannot be filtered through filter paper and are not visible to naked eye.
Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i.e. between 1-1000 nm. Smoke from a fire is example of colloidal system in which tiny particles of solid float in air. Just like true solutions, Colloidal particles are small enough and cannot be seen through naked eye.They easily pass through filter paper. But colloidal particles are big enough to be blocked by parchment paper or animal membrane.
blood, starch, ink : Colloidal Soln.
sugar sol., salt sol : true soln.

Multiple choice bio-chemistry absorption by roots - the processes involved osmotic relations of plant cells transport across membrane imbibition and its importance

The osmotic pressures of $0.1$ glucose and $0.1$M sucrose solutions are the same because ______________________.

  1. Both are carbohydrates

  2. These are different compounds having different molecular weights

  3. Both are present in the same concentration

  4. Glucose is reducing sugar while sucrose in non-reducing sugar
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice chemistry surface chemistry enzyme catalysis catalysis proteins and enzymes
Zymase is used to catalyse the hydrolysis of glucose.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Enzymes are macromolecular biological catalysts. These are highly selective catalysts greatly accelerating both the rate and specificity of metabolic reactions. All enzymes are insoluble since they exist in the colloidal state. Urease is an enzyme that catalyses the hydrolysis of urea, forming ammonia and carbon dioxide.
Zymase is used to catalyse the hydrolysis of glucose.
Zymase is an enzyme complex that catalyses the fermentation of glucose into ethanol and carbon dioxide. It occurs naturally in yeasts.

Multiple choice chemistry surface chemistry enzyme catalysis catalysis proteins and enzymes

Starch converts into maltose by the catalytic action of the enzyme:

  1. maltase

  2. zymase

  3. diastase

  4. lipase
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Starch converts into maltose by teh action of Diastase enzyme.

$\underset { starch }{ 2{ \left( { C } _{ 6 }{ H } _{ 10 }{ O } _{ 5 } \right)  } _{ n } } +n{ H } _{ 2 }O\xrightarrow [  ]{ Diastase } \underset { maltose }{ n{ C } _{ 12 }{ H } _{ 22 }{ O } _{ 11 } } $