Cell Biology Answers

WHY CELL MEMBRANES OCCUR IN THE FORM OF LIPID BILAYER ? EXPLAIN THE ORGANIZATION OF PROTEINS IN THE CELL MEMBRANE .

EXPLAIN BRIEFLY THE GENETIC CONTROL OF ENZYMATIC ACTIVITY IN PROKARYOTES .

1. NAME OF ORGANELLE RESPONSIBLE FOR EACH OF THE FOLLOWING PROCESSES IN AN EUCARYOTIC CELL ;

(a) DNA REPLICATION
(b) AUTO PHAGY
(c) ELECTRON TRANSFER DURING OXIDATIVE PHOSPHORYLATION
(d) PHOTOSYNTHESIS

2. GIVE ONE EXAMPLE OF EACH OF THE FOLLOWING TYPES OF BIOMOLECULES ;

(a) MONOSACCHARIDE
(b)PURINE
(c) POLYNUCLEOIDE WITH RIBOSE SUGAR
(d) DERIVED LIPID

3. NAME THE RTECHIQUE USED FOR SEPEARATION OF DIFFERENT CELLULAR OR ORGANELLES .

4. NAME THE DYE THAT STAINS ALL THE PROTEINS .

1. EXPLAIN BRIEFLY THE GENETIC CONTROL OF ENZYMATIC ACTIVITY IN PROKARYOTES .

2. WHY CELL MEMBRANES OCCUR IN THE FORM OF LIPID BILAYER ? EXPLAIN THE ORGANIZATION OF PROTEINS IN THE CELL MEMBRANE .

3. WHAT IS A PROTON PUMP ? DESCRIBE THE ROLE OF PROTON PUMP IN BACTERIA .

4. COMMENT ON THE ENDOSYMBIOTIC ORIGIN OF MITOCHONDRIA .

5. BRIEFLY EXPLAIN THE FOLLOWING ;

(a) RNA PROCESSING IN EUKARYOTES
(b) CELL CYCLE
(c) SIGNALLING MEDIATED BY INTRACELLULAR RECEPTORS

6. WITH THE HELP OF A SCHEMATIC DIAGRAM , GIVE AN ACCOUNT OF GLYCOLYSIS . WHAT HAPPENS TO PYRUVATE UNDER ANAEROBIC CONDITIONS ?

7. WITH THE HELP OF A LABELLED DIAGRAM , DESCRIBE THE STRUCTURE AND FUNCTION OF A MOTOR NEURON .

8. NAME THE PRINCIPLE WATER CONDUCTING AND PREPARED - FOOD CONDUCTING TISSUES OF PLANTS . DESCRIBE THE STRUCTURE OF ANY ONE OF THESE TISSUES .

DEFINE THE FOLLOWING ;

1. AUTORADIOGRAPHY
2. CODON
3. RESOLVING POWER OF A MICROSCOPE
4. PERMEABILITY CO - EFFICIENT
5. NUCLEOTIDE

1. A CELL IN WHICH THERE IN AN EXTENSIVE NETWORK OF ROUGH ENDOPLASMIC RECTICULUM IS ACTIVELY INVOLVED IN ---------------- SYNTHESIS.

2. MULTIPLE FORMS OF AN ENZYME THAT CATALYZE THE SAME REACTION ARE KNOWN AS ----------------- .

3. --------------- IS AN EXAMPLE OF SEMIAUDTONOMOUS ORGIANELLE .

4. GCLUCOSE IS STORED IN ANIMALS AS ------------------ .

5. ---------------- IS TYPE OF AN AMINO ACID WITH NEGATIVE CHARGE AND ACIDIC '' R '' GROUP .

EXPLAIN HOW DO THE ENZYMES CARRY OUT THE BIOLOGICAL REACTIONS WITH
HIGH SPECIFICITY AND EFFICIENCY ?

EXPLAIN SEMI - CONSERVATIVE REPLICATION OF DNA . WHAT ARE THE ENZYMES INVOLVED IN THIS PROCESS ? WRITE THEIR FUNCTIONS .

LIST FOUR TYPES OF TISSUES IN VERTEBRATES ON THE BASIS OF THEIR FUNCTION . DESCRIBE ANY TWO OF THESE.

DISTINGUISH BETWEEN THE FOLLOWING ;

(1) PROTONPUMP IN AEROBIC AND UNAEROBIC BACTERIA
(2) SCLERENCHYAMA AND COLLENCHYMA
(3) DIFFUSION AND OSMOSIS