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#### Biomolecules Model Question Paper 1

12th Standard EM

Reg.No. :
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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. The central dogma of molecular genetics states that the genetic information flows from

(a)

Amino acids Protein DNA

(b)

DNA Carbohydrates Proteins

(c)

DNA RNA Proteins

(d)

DNA RNA Carbohydrates

2. Among the following the achiral amino acid is

(a)

2-ethylalanine

(b)

2-methylglycine

(c)

2-hydroxymethylserine

(d)

Tryptophan

3. Vitamin B2 is also known as

(a)

Riboflavin

(b)

Thiamine

(c)

Nicotinamide

(d)

Pyridoxine

4. Which is a monosaccharide among the following?

(a)

Sucrose

(b)

Cellulose·

(c)

Maltose

(d)

Glucose

5. Identify the reducing sugar.

(a)

Sucrose

(b)

Cellulose

(c)

Starch

(d)

Glucose

6. 5 x 2 = 10
7. Give the differences between primary and secondary structure of proteins.

8. Write the Zwitter ion structure of alanine

9. List the expected products of hydrolysis of lactose.

10. ${ 6CO }_{ 2 }+{ 6H }_{ 2 }O\overset { Sunlight }{ \longrightarrow } { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 }+{ 6O }_{ 2 }$
Name the above process.

11. What are anomers? Give example.

12. 5 x 3 = 15
13. What are reducing and non – reducing sugars?

14. How are vitamins classified

15. What are harmones? Give examples

16. Justify the presence of keto group in C2 in fructose.

17. Why sucrose is called invert sugar?

18. 4 x 5 = 20
19. Define enzymes

20. What are different types of RNA which are found in cell

21. Explain the classification of hormones.

22. Outline the classification of carbohydrates giving example for each.(OR)
How are carbohydrates classified?