Biochemistry And Cell Biology

Course: B.Sc.-B.Ed. Code: RJ-118 Branch: Botany Year: 2024

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Roll No..
Total No. of Questions : 28 [Total No. of Printed Pages : 08
RJ-118
B.Sc.-B.Ed. (Secondary) Examination, 2024
(First Semester)
BOTANY
DC-II
Biochemistry and Cell Biology
[Time : 3 Hours] [Maximum Marks : 60]

Note : The question paper is divided into three Sections. Attempt all Sections as directed.

Section A
(Multiple Choice Questions)
Note : Attempt all questions.
1×15=15
1.

Cytoskeleton is located in :

(a) Plasmamembrane
(b) Nucleus
(c) Cytoplasm
(d) Mitochondria
2.

The monomer of a complex carbohydrate is :

(a) an amino acid
(b) a nucleotide
(c) monosaccharide
(d) a fatty acid
3.

Membranous structures in cells are composed of :

(a) Phospholipids
(b) Cellulose ✗
(c) Ribosomes
(d) Chromatin ✗
4.

The golgi apparatus produces :

(a) ribosomes
(b) DNA
(c) lysosomes
(d) endoplasmic reticulum
5.

A molecule that is acted upon by an enzyme is a :

(a) cofactor
(b) binding site
(c) vitamin
(d) substrate
6.

When a protein's three dimensional structure has been altered to the extent that it no longer functions, it has been :

(a) denaturated
(b) killed
(c) anabolized
(d) competitively inhibited
7.

The Krebs cycle and ETC are biochemical pathways performed in which eukaryotic organelle ?

(a) nucleus
(b) ribosomes
(c) chloroplast
(d) mitochondria
8.

A...........consists of stacks of membranous sacs containing chlorophyll :

(a) granum
(b) stroma
(c) mitochondrion
(d) cell wall
9.

Transcription copies genetic information :

(a) from DNA to RNA
(b) from proteins to DNA
(c) from DNA to proteins
(d) from RNA to proteins
10.

The function of t-RNA is to :

(a) be part of the ribosome's sub-unit
(b) carry the genetic blueprint
(c) carry an amino acid to a working ribosomes
(d) both (a) and (c) are correct
11.

If the two subunits of a ribosome do not come together with an mRNA molecule which will not occur ?

(a) transcription
(b) translation
(c) replication
(d) all of the above
12.

What is the key difference between mitosis and meiosis ?

(a) Mitosis involves two rounds of cell division whereas meiosis involves one round of cell division
(b) DNA is not split between cells in meiosis but this does occur during mitosis
(c) Mitosis produces cells genetically identical to the parent whereas meiosis produces cells with half the genetic information as the parent
(d) None of the above
13.

Chromosome are most likely to appear to be lining up near the middle of the cell during which phase of mitosis ?

(a) interphase
(b) prophase
(c) metaphase
(d) telophase
14.

Reduction division occurs :

(a) in meiosis II
(b) in meiosis I
(c) in mitosis
(d) after fertilization
15.

Turgor pressure is established in the :

(a) cell wall
(b) nucleus
(c) vacuole
(d) plasmodesmata
Section B
(Short Answer Type Questions)
3×5=15
Note : Attempt any Five questions.
1.
Describe endomembrane system.
2.
Describe three dimensional structure of ribosomes.
3.
Why are Mitochondria considered as semiautonomous organelle ?
4.
What is meiosis ? Why is meiosis needed for the production of gametes ?
5.
Describe photosynthetic pigments of chloroplasts.
6.
Describe ultra structure of nucleus.
7.
What are lysosomes ? Describe their origin, structure and function.
Section C
(Long Answer Type Questions)
6×5=30
Note : Attempt any Five questions.
1.
What is Chloroplast ? Describe ultrastructure of chloroplast. Where does dark reaction take place ? Which part of chloroplast is associated with the light reaction ?
2.
Why are mitochondria considered as power house of Eukaryotic cells ? Describe ultrastructure of Mitochondria. What are the major functions of Mitochondria ?
3.
Describe the types, structure and functions of Endoplasmic Reticulum. Also draw a diagram of ER.
4.
Describe Golgi apparatus. What types of vesicles arise from Golgi membranes ? Write the functions associated with Golgi apparatus.
5.
What is Cell division ? Differentiate between Karyokinesis and Cytokinesis. How does mitosis differentiate from Meiosis ? Draw various stages of Mitosis.
6.
Describe RNA. How many types of RNA exist in a eukaryotic cell ? What role RNA play in protein synthesis ? What is the site of protein synthesis ?
(2-M24-31/12) N-RJ-118 (2-M24-31/13) N-RJ-118 (2-M24-31/14) N-RJ-118 (2-M24-31/15) N-RJ-118