Exams for 1202 BCH

Name:

Basic Biochemistry

Mid. I

Q1. Put (√ ) or ( X ) , Correct ( X ) one.

1. Atom consists of positively charged nucleus " protons " and some neutrons

" negatively charged " surrounded by one or more orbital electrons " no charged " (    )

2. Covalent bond is a polar bond. (    )

3. Amino acids is a building blocks of lipids. (    )

4.Essential a.à can be synthesized in the body. (    )

5. Ninhydrin react with carboxyl group of α- a.à to give a colored yellow product (    )

6. Rs = Distance traveled by solvent / Distance traveled by solute. (    )

Q2. Give an example of each:

1. Contractile and mobile proteins.                            3. a.à with aromatic R-group,

                                                                                       (with the structure)

2. Covalent bond.                                                      4. a.à contain a sulfhydryl group.

(with the structure)

Q3. Fill in the Blanks:

1. A polar bond is a covalent bond when there is an ……………………………...........

between the two atoms .

2. R-group of a.à vary in ……………. , ………………. and …………………………. that influence there …………………. in water.

3. Glucogenic a.à produces ……………. as an end product , example ……………….

4. The structure of Zwitter ion is ……………………………………………………….

5. In chromatography : Molecules are separated on the basis of ………………...........

between two phases …………………….....and ……………………………………..

6. Few a.à joined by a peptide bond called as………………………………………... .

7. Secondary structure of proteins: Refers to arrangement of a.à that are ……………..

………………….. in the poly peptide chain.

GOOD LUCK!

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