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 movement in animals types of muscles muscles muscles and their structure muscle contraction

Match the following and find correct combination.

$(a)$ Abrin $(i)$ Lectin
$(b)$ GLUT-4 $(ii)$ Intercellular growth substance
$(c)$ Collagen $(iii)$ Hormone
$(d)$ Concanavalin $(iv)$ Enables glucose transport into cells
$(v)$ Toxin
  1. $a - iii, b - iv, c - ii, d - i$
  2. $a - v, b - iv, c - ii, d - i$
  3. $a - iii, b - iv, c - ii, d - v$
  4. $a - iii, b - v, c - ii, d - i$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Abrin is a highly toxalbumin found in the seeds of rosary pea.
Concanavalin A is a lectin extracted from jack bean,  and used to purify glycosylated molecules in lectin. 
Collagenis a intracellular growth substance. 
GLUT 4 is the insulin regulated glucose transporter found in the adipose tissues. 
So the correct answer is B.
Multiple choice pseudo first order reaction order of reactions chemical kinetics electrochemistry and chemical kinetics chemistry

Inversion of cane-sugar in dilute acid is a:

  1. biomolecuar reaction

  2. pseudo-unimolecular reaction

  3. unimolecular reaction

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

The inversion of cane sugar involves water in large excess, making the reaction rate depend only on the sugar concentration, which characterizes it as a pseudo-unimolecular reaction.

Multiple choice bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

Conversion of polysaccharide to monosaccharide is known as

  1. Anabolic reaction

  2. Catabolic reaction

  3. Both A and B

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

The catabolic processes are the reactions in which the large complex molecules are broken down to produce smaller organic molecules. The polysaccharide which is a complex molecule is broken down to from many small monosaccharide molecules. For example, glycogen is broken down to produce glucose molecules. 

Thus, the correct answer is option B. 

Multiple choice biology life processes: control and coordination feedback mechanism mechanism of hormone action and feedback mechanisms role of hormones in coordination

Blood sugar level is an example of _______

  1. Positive feed back mechanism

  2. Negative feedback mechanism

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The body has a mechanism to maintain a normal state. Whenever there is change in thus state there are messages through the body systems to increase if there is a fall below the normal , or decrease if there is rise above the normal. This kind of ordering for the opposite. Is negative feedback to restore the normal state.

Multiple choice hunger and dehydration from tasting to digestion digestion of food digestion evs

Glucose solution gives immediate strength even

  1. By quick digestion.

  2. Without digestion.

  3. By slow digestion.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Patients are given glucose by drip instead of food because the drip directly deposits the glucose into the bloodstream and hence the body parts get the glucose in a matter of minutes, but if it is given through food the glucose's energy would reach the body parts only after the digestion process and this will take a longer time. Hence to provide the patient with instant energy drip is chosen over food

So, the correct answer is 'Without digestion'.
Multiple choice evs deficiency diseases need for nutrients nutrients needed by the body balanced diet and malnutrition food for health nutrition and its deficiency nutrition and its need

Simple sugar of blood is

  1. Galactose

  2. Lactose

  3. Sucrose

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

Glucose is a simple monosaccharide sugar. It is a hexose sugar. It is an aldose sugar. Ingested carbohydrates are broken down into monosaccharides which are absorbed in the intestine. Glucose is absorbed in intestine. Glucose is also chief form of sugar in blood and circulates in blood to supply energy to visceral organs.

Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

The greatest amount of energy per gram is produced by

  1. Sugar

  2. Starch

  3. Fat

  4. Proteins

  5. Vitamins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Our food contains three main constituents: carbohydrates, fats and proteins. The amount of energy released when one gram of any of these food elements is burned is known as calorific value. Thus calorific value of food indicates as to how much is the energy value of food which the human body can gain through metabolism. It is usually given in kcal/gm. Fats form the most concentrated source of energy in our diet. 1 gram of fat yields 9.5 kcal of energy which is the highest among the food components. 1 gram of carbohydrates and proteins yield almost similar amount of energy which is equal to 4 kcal.
Thus, the correct answer is option C.
Multiple choice bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

Which of the following molecular form is stored energy in animals?

I. Glucose

II. Glycogen

III. Lipid

IV. Protein

  1. I and II

  2. II and III

  3. I, II and III

  4. II, III and III

  5. I, II, III and IV
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glycogen is a polysaccharide that serves as a form of stored energy  in animals and fungi. Excess glucose is polymerised and stored as glycogen in the liver of animals and starch in plants. Excess of fatty acid is converted to lipids. Adipose tissue stores lipids in the form of “triglycerides”.
Thus, the correct answer is option "II and III". 

Multiple choice bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

Which of the options given below would not correctly fill the blanks in the following sentence?


In order to absorb and use ____ by the body, these must be broken down by hydrolysis into ___.

  1. Polysaccharides, Monosaccharides

  2. Amino acids, Proteins

  3. Fats, Glycerol and Fatty acids

  4. Disaccharldes, Monosaccharides
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Proteins are converted into dipeptides in the stomach which is followed by the conversion of dipeptides to amino acids in the small intestine. These amino acids are absorbed through the wall of the intestine as simple absorbable substances.
  • Hence In order to absorb and use Proteins by the body, these must be broken down by hydrolysis into proteins.
  • So, the correct answer is 'amino acids, proteins'.
Multiple choice hmp shunt alternative to glycolysis carbohydrate metabolism respiration bio-chemistry

 Erythrose 4-phosphate is used in synthesis of 

  1. Carbohydrates.

  2. Aromatic amino acid.

  3. NADH.

  4. Erythrose-4-phosphate.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Erythrose-4-phosphate is an intermediate produced in the pentose phosphate pathway.  It is involved in the biosynthesis of aromatic amino acids. All the carbons in phenylalanine and tyrosine are produced from erythrose-4-phosphate and phosphoenolpyruvate. Phenylalanine and tyrosine are aromatic amino acids. Thus the correct answer is option B.

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

In glycolysis, glucose molecule is converted into which substance?

  1. Lactic acid

  2. Ethanol

  3. Pyruvate

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

The process by which the glucose (6C compound) is split into two molecules of pyruvic acid (3C compound) is called glycolysis or EMP pathway. It occurs in the cytoplasm. In glycolysis, 4ATP and 2NADH$ _2$ molecules are formed and 2ATP molecules are consumed in hexose phase

So, the correct answer is 'Pyruvate'

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

Glycogenolysis is

  1. Oxidation of sugar

  2. Conversion of glycogen into glucose

  3. Conversion of glucose into glycogen

  4. Conversion of glycogen into fat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glycogenolysis is the biochemical pathway by which glycogen is broken down into glucose-1-phosphate and glucose to provide energy or maintain blood sugar levels.