Zoology
The adjacent cells in an organized tissue are interconnected by:
A.
Tight junctions
B.
Hemidesmosomes
C.
Junctional channels
D.
Zonula adherens
Ribosomes can be seen within:
A.
Endoplasmic reticulum
B.
Lysosome
C.
Golgi complex
D.
Mitochondria
The number and concentration of ribosomes in a cell depends on:
A.
RNA contents of cell
B.
DNA contents of cell
C.
Cytoplasmic contents
D.
Protein synthetic activity
The double stranded structure of DNA was discovered by:
A.
Watson and Crick
B.
Khurana
C.
Nirenberg
D.
Flemming and Punnet
The golgi complex helps in:
A.
Formation of plasma membrane
B.
Formation of cell wall in plant cells
C.
Formation of secretory vesicles
D.
All of these
The golgi complex of lower invertebrates is known as:
A.
Dictyosomes
B.
Golgisome
C.
Desmosome
D.
Endosome
The golgi complex is made up of:
A.
Cisternae
B.
Vesicles
C.
Golgian vacuoles
D.
All of these
Hydrogen peroxide metabolism in an animal cell is carried out in the:
A.
Endoplasmic reticulum
B.
Nucleolus
C.
Mitochondria
D.
Peroxisomes
The process of engulfing large-size particles of solid food by the cell is known as:
A.
Pinocytosis
B.
Phagocytosis
C.
Emeiocytosis
D.
None of these
Pinocytosis was discovered by:
A.
Cohen
B.
W.L. Doyle
C.
W.H. Lewis
D.
S.O.Mast
V-shaped chromosomes are:
A.
Acrocentric
B.
Telocentric
C.
Sub-metacentric
D.
Metacentric
Genes are made up of:
A.
Nucleoproteins
B.
Lipoproteins
C.
Glycoproteins
D.
None of these
Mitosis consists of:
A.
Karyokinesis followed by cytokinesis
B.
Series of nuclear divisions
C.
Cleavage of cytoplasm
D.
None of these
Lampbrush chromosomes are found in:
A.
Fish
B.
Amphibians
C.
Reptiles and birds
D.
All of these
Which of the following is characterized by the presence of polytene chromosome?
A.
Man
B.
Snail
C.
Drosophila
D.
Birds
The site of ATP synthesis in the cell is:
A.
Plasmalemma
B.
Mitochondria
C.
Endoplasmic reticulum
D.
Chloroplasts
Which of the following are known as the power house of the cell?
A.
Mitochondria
B.
Lysosome
C.
Golgi complex
D.
Nucleolus
An animal cell differs from the plant cell in the absence of:
A.
Cell wall
B.
Mitochondria
C.
Golgi bodies
D.
Endoplasmic reticulum
Which of the following are the sex-linked lethal genes of man?
A.
Genes of haemophilia
B.
Genes for pseudohypertrophic muscular distrophy
C.
Both (a) and (b)
D.
Genes for phenylketonuria
Which of the following is known as suicidal bag of the cell?
A.
Mitochondria
B.
Ribosome
C.
Golgi complex
D.
Lysosome
The first person to see the cell under a microscope was:
A.
Anton V.Lewenhoeck
B.
Robert Hooke
C.
M.I.Schleiden
D.
T.Schwann
X-rays induce mutations by:
A.
Transition
B.
Transversion
C.
Frame-shift
D.
Chromosome breakage
Giesma is related with:
A.
Chromosome banding
B.
Klinfelter's syndrome
C.
Edward's syndrome
D.
Barr body
Carrier organism refers to an individual which carries a:
A.
Recessive gene that is expressed
B.
Recessive gene that is not expressed
C.
Dominant gene that is not expressed
D.
Dominant gene which is expressed
During meiosis, chiasma is observed at Pachytene. The presence of one chiasmata reduces the possibility of another occurring in the near vicinity. The phenomenon is called:
A.
Interference
B.
Position effects
C.
Coupling and repulsion
D.
Cis-trans effect