IGNOU BBYET-141 June 2022 Previous Year Question Paper

Q1.(a) Fillin the blanks. 5x1=5

(i) Nucleus is also called of the cell. Gi) are attached on the outer surface of rough endoplasmic reticulum.

(iii) The resolution of a microscope is determined by the of the objective lens.

(iv) are the carriers of hereditary material.

(v) Prokaryotic ribosomes are of 70S type, which are made up of larger and smaller subunits.

(b) Define the following : 3x1=3 @) Magnification

(ii) Electrophoresis

(ii) Translation

(c) State whether these statements are ‘True’ or ‘False’ : 4x 5 =2

(i) A beam of electrons are used as a source of illumination in an electron microscope.

(ii) The technique of HPLC can be used to detect compounds present in trace amounts.

(iii) Mitochondrial DNA contains 200 genes.

(iv) Cell wall is present in animal cells.

Q2.Describe the structure of a prokaryotic cell. Also give a well-labelled diagram. 7+3=

(10)

Q3.Describe the structure, composition and function of chloroplast with the help of well labelled diagram. 7+3=

(10)

Q4.List various models proposed for the structure of cell membrane. Explain ‘Fluid Mosaic Model’ with the help of a well-labelled diagram.

Q5.List various components of nucleus. Describe the structure of ‘nuclear pore complex’ with the help of neat labelled diagram.

Q6.Explain the structure of an Operon. Discuss its role in gene regulation.

Q7.(a) What is a Nucleosome ? Explain its structure with the help of a suitable diagram. 5

(b) Discuss the main features of genetic code.

Q8.Write short notes on the following : bQ21 0

(a) Golgi Bodies

(b) Principle of Spectrophotometer

(c) Phases of Cell Cycle

(d) Types of DNA BBYET-141 4 @ aad