BIOTECH/I/EC/01 Student's Copy
2 0 1 8
CBCS
1st Semester
BIOTECHNOLOGY
Paper BT-I
Cell Biology and Biomolecules
Full Marks 75
Time 3 hours
PART A—OBJECTIVE
Marks 25
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 10
Tick the correct answer in the brackets provided 1×10=10
1. The subunit of ribosome that functions as a ribozyme is
50S
30S
50S and 30S
None of the above
/25 1 Contd.
2. In the chloroplast, the light reaction of photosynthesis takes place in the
stroma
intermembrane space
grana
lamella
3. The transmembrane proteins that pass entirely through the lipid bilayer
and thus have domains that protrude from both the sides of the membrane
are called
integral proteins
peripheral proteins
soluble proteins
None of the above
4. When an amoeboid cell is stimulated in a uniform manner
the cells have a rounded morphology and remain
stationary
protrusions develop on one side of the membrane
the cells start growing protrusions stochastically
the cells persistently move in one direction with increased
speed
5. When a carbon atom shares an electron pair with a more electronegative
atom
the sharing is unequal in favor of the more electronegative
atom
the sharing is unequal in favor of the more electropositive
atom
the sharing is always equal
None of the above
6. The law of thermodynamics that refers to a state known as absolute zero is
the first law
the second law
the third law
None of the above
BIOTECH/I/EC/01/25 2 Contd.
7. Which of the following statements is not correct?
The sugar in RNA is ribose in contrast to deoxyribose
in DNA.
RNA contains the pyrimidine uracil in place of thymine.
Alkali can hydrolyse RNA but not DNA.
Both DNA and RNA obey Chargaff's rule
8. Each nucleotide base of one strand is paired in the same plane with a base
of the other strand by
phosphate bond carbon bond
hydrogen bond nitrogen bond
9. The ratio of the height of the image to the height of the object is called
linear magnification
focal length
resolving power
numerical aperture
10. The relationship between the resolving power and the wavelength in a
microscope is
the shorter the wavelength, the lower is the resolving power
the longer the wavelength, the greater is the resolving
power
the longer the wavelength, the lower is the resolving power
the shorter the wavelength, the greater is the resolving
power
SECTION—B
Marks 15
Write short notes on/Answer the following 3×5=15
1. Functions of endoplasmic reticulum
OR
Structural differences between prokaryotic and eukaryotic cells
BIOTECH/I/EC/01/25 3 Contd.
2. Types of membrane proteins and their relationship with the lipid bilayer
OR
Functions of muscle cells
3. Define pH.
OR
State the laws of thermodynamics.
4. Draw the structure of tRNA.
OR
Types of polysaccharides with examples
5. General principle of chromatography
OR
Two applications of electrophoresis
PART B—DESCRIPTIVE
Marks 50
The questions are of equal value
1. Describe the structure and function of nucleus.
OR
Write a note on the structure and function of mitochondria.
2. Elaborate on cell membrane transport mechanisms.
OR
Describe the different types of cytoskeletons.
3. Elaborate on the buffer systems.
OR
Write a note on the ionization of water.
4. Write a note on the structure and properties of nucleotides.
OR
Describe the classification, structure and functions of lipids.
5. Write the principle and applications of UV-VIS spectrometry.
OR
Write a note on centrifugation.