NEET UG Biology Biomolecules 1 MCQs

IMPORTANT POINTS

The Substances which are formed due to bond formation between C and H are called organic substances. A carbohydrate molecule contains Carbon, Hydrogen, and Oxygen. The ratio of H and O is generally 2 : 1 as water (H₂O)

-Carbohydrates have the general formula of C_n(H₂O)_m.

-Carbohydrates can be divided into three main types. These are,

· Monosaccharides (single sugar unit)

· Disaccharides (two sugar unit)

· Polysaccharide (many sugar unit)

-Different monosaccharides contain different numbers of carbon atoms. Trioses contain three, Pentoses contain five, and Hexoses six.

-Carbohydrates have many different functions and come in many different forms.

-Ribose and Deoxy ribose are both pentose monosaccharide and are found in RNA and DNA.

-Lipids are of three types,

i Simple lipids

ii Complex lipids

iii Steroids.

-Lipids are the food stuffs of highest Calorific value and they are stored in the body as a reserve food.

1. Match the terms in columns – I with suitable terms in column – II :

Column – I                       Column – II

P, Glucose                          i (c₆ H₁₀O₅)_n

Q, Maltose                          ii R-COOH

R , Glycogen                      iii (CH₂O)_n=m

S , Fatty acids                    iv C_n(H₂O)_n-1

a) P iv Q i R iii S ii

b) P iv Q iii R i S ii

c) P iii Q iv R ii S i

d) P iii Q iii R i S ii

2. Match the terms in column-I with suitable terms in column-II

Column – I                       Column – II

P C₆H₁₀O₅                       i Glyceraldehyde

Q C₃H₆O₃                        ii Galactose

R C₅H₁₀O₄                      iii Ribulose

S C₆H₁₂O₆                      iv Deoxy ribose sugar

a) P i Q iii R ii S iv

b) P iv Q iii R ii S i

c) P iii Q i R iv S ii

d) P i Q iii R ii S iv

3. Match the terms in column-I with suitable terms in column-II.

Column – I                   Column – II

P Butyric acid               i Long chain Unsaturated fatty acid

Q Stearic acid              ii Short chain Unsaturated fatty acid

R Oleic acid                 iii Short chain Saturated fatty acid

S Crotonic acid            iv Long chain Saturated fatty acid

a) P iii Q iv R i S ii

b) P iii Q i R iv S ii

c) P iv Q iii R i S ii

d) P iv Q iii R ii S I

4. Match the terms in column-I with suitable terms in column-II.

Column – I                   Column – II

P Glucose                     i Stored food in plants

Q ellulose                     ii Reserve food in animals

R Starch                       iii The plant cell wall

S Glycogen                  iv Most widely used in respiration

a) P iv Q iii R ii S i

b) P iv Q iii R i S ii

c) P iii Q i R iv S ii

d) P iii Q iv R ii S i

5. Match the terms in column-I with suitable terms in column-II.

Column – I                         Column – II

P Glycosidic bond               i Triglycerides

Q Ester bond                       ii Dinucleotide

R Peptide bond                   iii Disaccharide

S Phosphodiester bond      iv Dipeptide

a) P i Q iii R ii S iv

b) P iii Q iv R i S ii

c) P iii Q i R iv S ii

d)P ii Q iv R iv S iii

6. Match the terms in column-I with suitable terms in column-II

Column – I          Column – II

P PGAL                 i The plant cell wall

Q Oleic acid          ii Plasma membrane and membrane of organiles.

R Glycerol            iii Unsaturated fatty acid

S Phospholipid     iv Phosphate aldotriose sugar

T Cellulose           v Trihydroxy alcohol

a) P v Q iv R i S ii T iii

b) P iv Q v R ii S i T iii

c) P iii Q iv R ii S v T i

d) P iv Q iii R v S ii T i

7. Which the following is the word regarding steroids is not correct?

a) Cortisone

b) Progesterone

c) Glycolipid

d) Ergosterol

8. Which of the following statement regarding to properties of starch is not correct?

a) Present of amylose and amylopectin chains.

b) Stored food in plants.

c) Soluble in water.

d) Not sweet.

9. Which one of the following pairs is not correctly matched?

a) Triose sugar→Glyceraldehyde → Aldo sugar.

b) Pentose sugar →Ribulose → Keto sugar.

c) Hexoses sugar→Fructose → Aldo sugar.

d) Triose sugar →Dihydroxy acetose →Keto sugar.

10. Which the folowing pair regarding to biological importance of carbohydrates is not correctly matched?

a) Cellulose→Forms the plant cell wall.

b) Glycogen →Reserve food in animals.

c) Ribose sugar→Structural components of ATP.

d) Galactose→The most widely used in respiration.

11. Which the following regarding to examples of Keto sugar is not correctly?

a) Fructose b) Ribulose b) Ribose sugar d) Dihydroxy acetose.

12. Which of the following pairs is not correctly matched?

a) Butter – Glycerol + 3 Fatty acids.

b) Waxes – Monohydroxy alcohol + 1 Fatty acid.

c) Cortisone – Present of –COOH or >C=O group.

d) Glycolipid – Glycerol + Lipid.

13. Which of the following option is not correctly for this molecule?

a) It is Keto hexoses sugar. b) Hydrolysis of a molecule of maltose

c) It can pass through the cell membarane d) Found in the juice of fruits.

14. Which one of the following pairs is not correctly matched?

a)Galactose – Lactose

b) Fructose – Glucose

c) Fructose – Galactose

d) Ribose – Deoxyribose.

15. Which one of the following pairs is not correctly matched?

a) Triose sugar – DHAP.

b) Starch – amylase and amyloprectin.

c) Phospholipid – plasma membarane.

d) Cortisone – sterols.

16. Which one of the following pairs is correctly matched?

a) Fats → Long saturated Fatty acidss chain.

b) Derivatives of Lipid → Vitamins A, D, E.

c) Deoxyribose → RNA.

d) Glycogen → Forms the plant cell wall.

17. Lipids are relatively insoluble in….

a) Chloroform b) Water

b) Benzene d) Ether.

18. Which of the following statement regarding the Fatty acid is not correct?

a) Unsaturated fatty acids are two successive carbon atoms at certain places therein are linked by a double bond.

b) Saturated fatty acids are capable of accepting hydrogen or halogen atoms.

c) Butyric acid and palmitic acids are Saturated fatty acids

d) Crotonic acid and oleic acid are Unsaturated fatty acids.

19. Which of the following statement regarding to Lipid is not correct?

a) Lipids are of three types i Simple ii Complex iii Steroids

b) The lipids are a heterogenous group of compounds related to Fatty acids.

c) Lipids are the important constituents of the diet because of their high energy value.

d) Lipids are formed of C, H and O atoms, The number of H atom is less than ahat of O.

20. Which of the following statement regarding to Amylase is not correct?

a) Unbranched polysaccharide chains made up of glucose units.

b) Amylase occur in the constitution of glycogen.

c) Amylase occur in more amount in starch.

d) None of these

21. Which of the following statements are true?

P : Those which have molecular weights 596 Dalton are called micromolecules.

Q: Those which have molecular weights 1288 Dalton are called macromolecules.

R: Lipids have molecular weight more than ten thousand Dalton and above.

S: Biomolecules are of three types (i) micromolecules (ii) simply biomolecules and (iii) macromolecules.

a) P and Q b) P, Q and R

c) R and S d) Q and S.

22. Which of the following options suggest number of carbons in descending order?

P Fructose Q Palmitic acid. R Ribulose S Oleic acid.

a) R →Q → P → S

b) R → P → Q → S

c) S → Q → P → R

d) S → P → Q → R

23. In the formation of triglyceride, glycerol get linked with any Fatty acids by…

a) –NH₂ b) –COOH c) –CHO d) >C=O

Which of the following the correct option for statement P and statement Q.

(A) If both ‘A’ and ‘R’ true and ‘R’ is a correct explaination of’ A’

(B) If both ‘A’ and ‘R’ true and ‘R’ isnot a correct explaination of’A’

(C) If A is ture the R is false

(D) If A is false the R is ture

24. P : Steroids do not contain Fatty acids.

      Q : In the structure of wax an alcohol molecule is one monohydroxy alcohol

25. P : The presence of lipid is inevitable for the activity of glucose phosphatase.

      Q : Copper is co-factor for the activation of enzymes like phosphatase.

26. P : Cortisone molecules which contain only Carboxyl (-COOH) or keto C>C=O group.

      Q : Cortisone do not contain Fatty acids.

27. P : In animal the food is stored as glycogen

      Q : Amylase and amylopectin are occuring in the constitution of glycogen.

28. Which of the following structure shows the molecules?

a) Glucose

b) Fructose

c) Galactose

d) None of these