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 zoology biotechnology: general introduction application of biotechnology miscellaneous applications of biotechnology application of biology in therapy and vaccine

The commercial blood glucose biosensor uses which of the following enzymes?

  1. Glucokinase

  2. Glucose oxidase

  3. Phosphofructokinase

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

Glucose oxidase is widely used for the determination of free glucose in body fluids and in the food industry. It also has many applications and typically enzyme assays for biochemistry including biosensors. 

Multiple choice chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

Consider the following reagents
I. ${Br} _{2}$ water  II. Tollen's reagent
III. Fehling's solution which cannot be used to make distinction between an aldose and a ketose?

  1. I, II and III

  2. II and III

  3. I only

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

Bromine water reacts with both aldoses and ketoses (though at different rates, it is not a specific test for distinction). Tollen's reagent and Fehling's solution are specific tests for aldehydes, which distinguish aldoses from ketoses.

Multiple choice chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

Equimolar mixture of a $\alpha-D(+)$- glucose and $\beta-D(+)$-glucose has specific rotation (${[\alpha]} _{D}$) is:

  1. $-{92.4}^{o}$
  2. $+{112.5}^{o}$
  3. $+{52.5}^{o}$
  4. $-{19.2}^{o}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The specific rotation of α-D-glucopyranose decreases from +112° to +52.5°.
The specific rotation of β-D-glucopyranose increases from +19° to +52.5°.
The specific rotation of equimolar mixture of  $\alpha$ - D(+) - glucose and $\beta$ - D(+) - glucose has a specific rotation $52.5^0$.

Hence, the correct option is C.
Multiple choice biochemical polymers polymerisation chemistry

Emperical formula of glucose is 

  1. ${C _6}{H _{12}}{O _6}$
  2. $\;{C _3}{H _6}{O _3}\;$
  3. $\;{C _2}{H _4}O\;\;\;\;$
  4. $C{H _2}O$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The empirical formula is the simplest whole-number ratio of atoms in a compound. For glucose (C6H12O6), the ratio of C:H:O is 1:2:1, resulting in CH2O.

Multiple choice biochemical polymers polymerisation chemistry

The sugar unit present in the nucleotides of RNA is :

  1. D - ribulose.

  2. L - ribose.

  3. D - ribose.

  4. L - ribulose.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

RNA (Ribonucleic acid) contains the sugar D-ribose, whereas DNA contains 2-deoxy-D-ribose.

Multiple choice bio-chemistry carbohydrate metabolism diabetes mellitus lifestyle diseases coordination in human beings- chemical control non-infectious diseases

For a person suffering from diabetes, the intake of carbohydrates should be preferably in the form of 

  1. Monosaccharide

  2. Disaccharide

  3. Polysaccharide

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

Carbohydrates should constitute around 60-70% of the total calories in diabetics. Carbohydrates in the form of simple sugars need restriction. The carbohydrates should be in the form of complex polysaccharides (starch) and contain adequate amount of digestible fibres. Very high carbohydrate intakes and/or high glycaemic index foods can exacerbate the dyslipidemia, including hypertriglyceridemia.

Therefore, the correct answer is option C.

Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

Which of the following chemical substance is absorbed by passive transport from the intestine?

  1. Glucose

  2. Galactose

  3. Amino acid

  4. Fructose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The chemical substance which is absorbed by the passive transport from the intestine is glucose, transported by SGLUT 1 and SGLUT 2
So, the correct answer is 'Glucose'
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.