Zoology
The tubular forms of endoplasmic reticulum are more abundant in cells which synthesise:
A.
Proteins
B.
Carbohydrates
C.
Steroids
D.
Lipids
Which one of the following is an example to cell theory?
A.
Bacteria
B.
Viruses
C.
Protists
D.
Protozoans
The common immediate source of energy in cellular activity or energy is stored in:
A.
ATP
B.
ADP
C.
NAD
D.
Mitochondria
The process of transcription involves:
A.
Conversion of RNA and DNA
B.
Conversion of RNA from DNA
C.
Movement of RNA from nucleus to ribosome
D.
Change of one from of RNA into the other
The Singer Model of plasma membrane differs from the Robertson's model in the:
A.
Number of lipid layers
B.
Arrangement of lipid layers
C.
Arrangement of proteins
D.
Absence of proteins in the Singer model
Restriction enzymes are used:
A.
To cut DNA at certain places
B.
To synthesize DNA
C.
To synthesize RNA
D.
To synthesize ATP
The plasma membrane of an animal cell is composed of:
A.
Glycoproteins
B.
Phosphoprotein
C.
Phospholipoproteins
D.
None of these
The largest cells known so far are:
A.
Brain cells
B.
Ostrich eggs
C.
Human nerve cells
D.
Squid giant nerve cells
The smallest cells so far known are those of:
A.
Pleuroneumonia-like virus
B.
Tobacco mosaic virus
C.
Streptococcus
D.
Diplococcus
A cell, uninfluenced by the environment and unstrained with the pressure of specialised function, will:
A.
Collapse
B.
Be vertically longer due to the force of gravity
C.
Be spherical in form
D.
Be amoeboid in form
The technique used for tracing the route and conversion of molecules in different biochemical reactions occurring in the cell is known as:
A.
Electrophoresis
B.
Autoradiography
C.
Chromatography
D.
Fractionation
If a cell homogenate is subjected to centrifugation, the order in which the cellular components would sediment from bottom to lop is:
A.
Nuclei, mitochondria, ribosomes, microsomes
B.
Mitochondria, nuclei, ribosomes, microsomes
C.
Ribosomes, microsomes, mitochondria, nuclei
D.
Nuclei, mitochondria, microsomes, ribosomes
Who proposed the 'Protoplasm theory' which infers that the cell is an accumulation of living substance or protoplasm?
A.
Purkinji
B.
Von Mohl
C.
Schultze
D.
Huxley
The presence of nucleus inside the cell was discovered by:
A.
Robert Hooke
B.
Robert Brown
C.
Leuwenhoek
D.
Balbiani
Benda coined the term:
A.
Mitochondria
B.
Golgi complex
C.
Lysosome
D.
Endoplasmic reticulum
Sickle-cell anaemia is due to:
A.
Genes
B.
Hormones
C.
Enzymes
D.
All of these
Haemophilia is:
A.
Clumping of R.B.C
B.
Dissolution of blood cells
C.
Failure of blood clotting
D.
None of these
Most of the sex-linked characters are generally:
A.
Lethal
B.
Recessive
C.
Dominant
D.
None of these
In gene mutations when a purine is substituted by another purine it is called:
A.
Transformation
B.
Translocation
C.
Transversion
D.
Transition
"Blue prints" of all organization and activities in protoplasm are contained in:
A.
RNA
B.
DNA
C.
Both of these
D.
None of these
A plant is heterozygous and is designated Tt and produces two kinds of gametes T and t. The probability of t gametes fertilizing T or t is:
A.
1/1
B.
1/2
C.
1/3
D.
1/4
Germ cells in vertebrate gonads are produced by:
A.
Only mitosis
B.
Only meiosis
C.
Both mitosis and meiosis
D.
Maturation without cell division
The cell theory was propounded by:
A.
Boveri
B.
Schleiden and Schwann
C.
Sutton
D.
Punnet
Endoplasmic reticulum is believed to originate from:
A.
Cytoplasm
B.
Nuclear membrane
C.
Plasma membrane
D.
Golgi complex
Phenylketonuria causes:
A.
Mental retardation
B.
Pale skin
C.
Tendency to epileptic seizure
D.
All of these