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

Which biomolecule is the main source of energy?

  1. Carbohydrate

  2. Protein

  3. Lipid

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

Carbohydrates, specifically glucose, are the primary and most readily available source of energy for cellular processes. While lipids store more energy per gram, carbohydrates are the main fuel source.

Multiple choice

Which of the following is not a function of complex carbohydrates?

  1. bind batters to foods during deep frying

  2. brown breads and baked goods

  3. stabilize ice cream

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

Browning in breads and baked goods is primarily caused by the Maillard reaction (between amino acids and reducing sugars) or caramelization, not by complex carbohydrates themselves.

Multiple choice

Pectins are _______.

  1. called sugar acids

  2. derived from sugar

  3. found naturally in plant cells

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

Pectins are naturally occurring polysaccharides found in plant cell walls, and they are chemically related to sugar acids (galacturonic acid).

Multiple choice

Starches can be defined as _______.

  1. monosaccharides

  2. disaccharides

  3. indigestible sacchaarides

  4. polymers of sugars
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Starches are complex carbohydrates composed of long chains of glucose units, making them polymers of sugars. They are not simple sugars like monosaccharides or disaccharides.

Multiple choice

______ Forms the rigid structure of plants.

  1. amylose

  2. cellulose

  3. pectin

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

Cellulose is a structural polysaccharide that provides rigidity to plant cell walls. It is the primary component of plant fibers.

Multiple choice

Cellulose is made up of a large number of_______ units 

  1. glucose

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

Cellulose is a natural polysaccharide consisting of a linear chain of several hundred to many thousands of beta-glucose units. It is the primary structural component of plant cell walls.

Multiple choice botany metabolism, cell respiration, and photosynthesis light dependent or hill reaction phases of photosynthesis emerson's experiments & hill's reaction

Translocation of sugar in angiosperms occur in the form of 

  1. Glucose

  2. Starch

  3. Lactose

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

Translocation is the process of movement of nutrients from leaves to other parts of plant. During the process of photosynthesis, carbohydrates (sugars) specifically sucrose is synthesized in the cytosol of cell and then translocated to other demanding parts of plant. Sucrose is complex, less reactive and energy efficient sugar so, angiosperms and other plants translocate sugar in the form of sucrose.