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Who concluded, based on his studies on plant tissues, that the presence of cell wall is a unique character of plant cells ?

If the centromere is situated close to the end of a chromosome, it is called as:
1. Metacentric
2. Submetacentric
3. Acrocentric
4. Telocentric

Centrioles, cilia, flagella, and basal bodies have remarkably similar structural elements and arrangements. This leads us to which of the following as a probable hypothesis?
1. Disruption of one of these types of structure should necessarily disrupt each of the others as well.
2. Loss of basal bodies should lead to loss of all cilia, flagella, and centrioles.
3. Motor proteins such as dynein must have evolved before any of these four kinds of structure.
4. Natural selection for motility must select for microtubular arrays in circular patterns.

The presence of cholesterol in the plasma membranes of some animals.
1. enables the membrane to stay fluid more easily when cell temperature drops.
2. enables the animal to remove hydrogen atoms from saturated phospholipids.
3. enables the animal to add hydrogen atoms to unsaturated phospholipids.
4. makes the membrane less flexible, allowing it to sustain greater pressure from within the cell.

Chromatophores are:
1. present in liopolysaccharide layer of gram negative bacteria
2. colored pigments present in fluorescent bacteria
3. vesicles that store pigments in prokaryotic cells
4. extensions on membrane in cynobacteria 

Mitochondria and chloroplast are
I.semi-autonomous organelles.
II. formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery.
Which one of the following options is correct?
(1) Il is true but I is false
(2) I is true but ll is false
(3) Both I and I are false
(4) Both I and II are correct
 

Which of the following is not a feature of the plasmids?
(a) Circular structure
(b) Transferable
(c) Single-stranded
(d) Independent replication

Water soluble pigments found in plant cell vacuoles are
(1) chlorophylls
(2) carotenoids
(3) anthocyanins
(4) xanthophylls

Which of the following statements is not true for cancer cells in relation to mutations?
1. Mutations destroy telomerase inhibitor
2. Mutations inactivate the cell control
3. Mutations inhibit production of telomerase
4. Mutations in proto-oncogenes accelerate the cell cycle

Balbiani rings are sites of
1. lipid synthesis
2. nucleotide synthesis
3. polysaccharide synthesis
4. RNA and protein synthesis

Cytochromes are found in
1. matrix of mitochondria
2. outer wall of mitochondria
3. cristae of mitochondria
4. lysosomes

Which one of the following also act as a ribozyme in a bacterial cell?
1. snRNA
2. hn RNA
3. 23 S rRNA
4. 5 S rRNA

In eubacteria, a cellular component that resembles eukaryotic cells is
1. nucleus
2. ribosomes
3. cell wall
4. plasma membrane

Keeping in view the 'fluid mosaic model for the structure of cell membrane, which one of
the following statements is correct with respect to the movement of lipids and proteins
from one lipid monolayer to the other (described as flip-flop movement)?
1. Both lipids and proteins can flip-flop
2. While lipids can rarely flip-flop, proteins cannot
3. While proteins can flip-flop, lipids cannot
4. Neither lipids, nor proteins can flip-flop

Which of the following statements regarding mitochondrial membrane is not correct?
1. The outer membrane is permeable to all kinds of molecules
2. The enzymes of the electron transfer chain are embedded in the outer membrane
3. The inner membrane is highly convoluted forming a series of infoldings
4. The outer membrane resembles a sieve

Which one of the following phenomena is commonly referred as 'cell drinking?
1. Endocytosis
2. Exocytosis
3. Phagocytosis
4. Pinocytosis

An organelle present in all plant cells but absent from those of animals is
1. Mitochondria
2. peroxisome
3. glyoxysomes
4. Centrioles

Which of the following is not a true subcellular organelle ?
1. Peroxisome
2. Ribosome
3. Chloroplast
4. Lysosome.

Extranuclear genes occurs in
1. plastids and are not inherited
2. plasmid and are not inherited
3. mitochondria and are inherited by female
4. mitochondria and are inherited by male.

Some Gram -ve bacteria have peptidoglycan and an extra layer of
1. lipo-polysaccharide
2. teichoic acid
3. cellulose
4. both 2. and 3.

What is common between chloroplasts, chromoplasts and leucoplasts ?
(1) Presence of pigments
(2) Possession of thylakoids and grana
(3) Storage of starch, proteins and lipids
(4) Ability to multiply by a fission-like process

The microscope usually used for seeing living cells or tissues is
(1) compound microscope
(2) electron microscope
(3) phase contrast microscope
(4) light microscope.

Chromatin is made up of:
(1) DNA and protein
(2) DNA and histone
(3) DNA, RNA, protein
(4) RNA, histone and oil bodies.

If a biochemical analysis of mitochondria has to be done, the best procedure would be
(1) select cells which have a larger number of mitochondria
(2) plasmolyse the cell and filter out the mixture and take the debris
(3) grind the cells and filter out the mixture and take the debris
(4) subject the cell to cell fractionation (centrifuge) and obtain mitochondria

The percentage of cell surface that is impenetrable for ions is
(1) 1 %
(2) 99.9 %
(3) 90 %
(4) 73 %

Who invented cell?
(1)Anton Von Leeuwenhoek
(2)Robert Brown
(3)Robert Hooke
(4)None of these

Which of the following is true about Robert Hooke?
(1)He saw first cell
(2)He saw first dead cell
(3)He saw first cell wall
(4)All of the above

How many of the following cell organelles are not present in prokaryotic cell?
Endoplasmic reticulum, Nucleus, lysosomes, vacuoles, ribosomes, centrioles
 
(1)6
(2)5
(3)4
(4)2

In which of the following cell organelles ribosomes are present?
(1)cytoplasm
(2)Mitochondria and chloroplast
(3)Nucleus, Mitochondria and chloroplast
(4) cytoplasm, Mitochondria and chloroplast

Which of the following is not true about plasmid
(1) extra chromosomal DNA
(2)give unique genotypic characters to bacteria
(3)helps in antibiotic resistance
(4)helps in reproduction

Arrange the following in the increasing of their size
(1)virus< PPLO< typical bacteria< typical eukaryotic cell
(2) PPLO< virus< typical bacteria< typical eukaryotic cell
(3) virus< PPLO< typical eukaryotic cell< typical bacteria
(4) virus> PPLO> typical bacteria> typical eukaryotic cell

In membranes, the lipids are arranged within the membrane with the ______heads towards the outer sides and the _________ tails towards the inner part.
(1)polar, charged
(2)polar, hydrophobic
(3)polar, nonpolar
(4)Both B and C

The movement of water across membranes is from
(1)higher to lower concentration of water
(2)lower to higher concentration water
(3)outside of the cell to its inside
(4)Both A and C

The common component between the cell wall of algae and plants is
(1)cellulose
(2)Hemicellulose
(3)Both A and B
(4)Mannans

Which of the following holds the neighbouring cells together
(1)calcium pectate
(2) sodium pectate
(3)Both A and B
(4)manganese pectate

The classification of bacteria into Gram positive and Gram negative had been possible due to
(1)difference in cell envelopes
(2)differences in staining procedure
(3)differences in decolorising process
(4)All of the above

How many of the following structures are present in Bacteria?
(Flagella, cilia, pili, fimbriae)
(1)4
(2)3
(3)2
(4)1

Where can we find the ribosomes in Bacteria
(1)In cytoplasm
(2)In mitochondria
(3)On Endoplasmic reticulum
(4)All of these

Which of the following is true about ribosome except
(1)site of protein synthesis
(2)universal cell organelle
(3)70s is present only in prokaryotes
(4)80s is present in eukaryotes

Bacteria store their reserved food materials in
(1)Vacuoles
(2)Inclusion bodies                             
(3)Both A and B
(4)Sphaerosomes

Which of the followings  are common to plant cell and animal cell?
(Peroxisome, nucleolus, lysosome, plasmodesmata, microvilli, microtubule)

Which of the following is true except
(1)all eukaryotic cells are identical
(2)eukaryotic cells possess an organised nucleus with a nuclear envelope
(3)compartmentalisation is present in eukaryotes
(4)All are correct

In 70S, S is
(1)sedimentation coefficient
(2)indirect measure of density and size
(3)indirect measure of mass and size
(4)Both A and B

Cytoskeleton is made up of
(1)Proteins
(2)carbohydrates
(3)lipids
(4)All of these

Cilia and flagella are
(1)microtubule
(2)microfilament
(3)intermediate filament
(4)Both A and B

Which of the following is the structural and functional unit of bacterial flagella and cilia
(1)axon
(2)axoneme
(3)flagellin
(4)All of the above

Which of the following vacuole is present in photosynthetic bacteria
(1)Food vacuole
(2)Gas vacuole
(3)Contractile vacuole
(4)Sap vacuole

ETS takes place in which of the following compartment of mitochondria
1. inner compartment
2. outer compartment
3. matrix
4. Both A and C

Which of the following is not a modification of endoplasmic reticulum
1. Sarcoplasmic reticulum
2. Nissl’s granules
3. myeloid bodies
4. None of these

On what basis chromosomes have been divided into four classes.
1. position of centromere
2. position of primary constriction
3. number of kinetochores
4. Both A and B