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WorksheetsCell Structure & Function
Total questions: 50
Worksheet time: 50mins
Magnification of a microscope having objective lens of 35 X and eye piece of 15X would be:
350x
1350x
525x
1700x
In which of the following units, the sedimentation coefficient of a subcellular
particle is expressed?
Newton
Dalton
Svedberg
Decibel
If a biochemical analysis of mitochondria is to be done, the best procedure would be
Plasmolyse the cells, filter it and take the debris
Select cells which have a large number of mitochondria
Grind the cell and filter out the mixture and take the debris
Subject the cells to centrifugation and obtain mitochondria
‘Omnis cellula e cellula’. This statement was given by:
R. Brown
M. J. Schleiden
R. Virchow
T. Schwann
Animal cell differs from plant cell in possessing:
Plastids
Vacuoles
Centrosomes
Mitochondria
An organism having cytoplasm, DNA and RNA but no cell wall is:
Virus
Bacterium
Mycoplasma
Cyanobacterium
Naked DNA without histones is found in
Protozoa
Eukaryotes
Ceolenterata
Prokaryotes
Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic?
Whether or not the cell contains DNA
The presence or absence of ribosomes
Whether or not the cell is partitioned by internal membranes
The presence or absence of rigid cell wall
Bacterial flagella do not show ATPase activity and 9+2 organization. These are chemically
Pilin
Tubulin
Flagellin
Bacteriocins
Lipid bilayer is associated with:
Ribosomes
Nucleolus
Chromosomes
Plasma membrane
Which of the following is true for the carbohydrate portion of the cell membrane?
It has a symmetric distribution
It is found primarily in the form of free saccharide groups
It forms the glycocalyx consisting of glycolipids and glycoproteins
It contributes to the polycationic charge on the extra cellular surface
In prokaryotic cells, the enzymes involved in the oxidation of metabolites are
associated with:
Nucleus
Nucleoid
Ribosomes
Plasma membrane
In facilitated diffusion:
Hydrolysis of ATP is required
Specific substances are transported against their concentration gradient
Membrane phospholipids create channel that permits diffusion of a specific substance
membrane protein binds to a specific solute and then undergoes a conformational change
If a living plant cell is placed in a concentrated sugar solution, the cell will:
Gain water and become turgid
Absorb sugar and become plasmolysed
Lose water and become plasmolysed
Stay the same because cell sap is sugary
The blood cell which shows phagocytosis is
Platelets
Basophils
Monocytes
Eosinophils
The water soluble materials pass through the proteins called:
Spectrin
Glycocalyx
Glycoprotein
Channel proteins
Intercellular material between two adjacent plant cells is:
Primary wall
Middle lamella
Secondary wall
Plasma membrane
Plasmodesmata connections help in:
Cytoplasmic streaming
Locomotion of unicellular organisms
Synchronous mitotic divisions
Movement of substances between cells
Which of the following is not a characteristic of the cytosol?
It surrounds the cytoskeleton
It is the fluid portion of the cytoplasm
It is located inside the nucleus and organelles
It contains both organic and inorganic substances
Endoplasmic reticulum work for the synthesis of:
ATP molecules
Proteins
Photosystems
Carbohydrates
Endoplasmic reticulum is attached with:
Centrosome
Mitochondria
Nuclear membrane
Golgi complex
A type of cell called a lymphocyte makes proteins that are exported from the cell. It is possible to track the path of these proteins within the cell by labelling them with
radioactive isotopes. Which of the following might be the path of the protein from the site where its polypeptides are made to the lymphocyte’s plasma membrane?
Rough ER→Golgi→Plasma membrane
Golgi →Rough ER→ Plasma membrane
Smooth ER → Lysosome→ Plasma membrane
Nucleus → Golgi→ Rough ER→ Plasma membrane
The surface of the endoplasmic reticulum is studded with:
RNA
Ribosomes
DNA
Glucose molecules
Microsome is the collective name for:
Mass of substances synthesized in the cell
Cytoplasmic organelle obtained after centrifugation of cell
Artificially generated disrupted membrane fragments of endoplasmic reticulum
Group of ribosomes participating in synthesis of polypeptide chains using the same mRNA
Dictyosomes are:
Golgi bodies
Classes ribosomes
Respiratory particles
Store a large quantity of food
You would expect a cell with an extensive Golgi apparatus to:
Move actively
Make a lot of ATP
Secrete a lot of material
Store a large quantity of food
Vesicles are essential for the normal functioning of the Golgi apparatus because they:
Provide energy for chemical reactions
Contribute to the structural integrity of the organelle
Produce the sugars that are added to proteins
Move proteins and lipids between different parts of the organelle
Lysosomes were discovered by:
Palade
Porter
De Duve
Benda
Which of the following cellular organelles is/are bounded by a single membrane?
Peroxisomes, Lysosomes, Mitochondria
Only peroxisomes but not lysosomes and mitochondria
Both peroxisomes and lysosomes but not mitochondria
All of three organelles
None of three organelles
Some of the enzymes which are associated in converting fats into carbohydrates are
present in:
Liposomes
Glyoxysomes
Microsomes
Golgi bodies
In mitochondria, cristae act as sites for:
Protein synthesis
Oxidation-reduction reactions
Breakdown of macromolecules
Phosphorylation of flavoproteins
Which of the following statement is correct?
Mitochondria contain circular DNA, but chloroplasts lack it
Chloroplasts contain circular DNA, but mitochondria lack it
Neither mitochondria nor chloroplast contain any DNA
Both mitochondria and chloroplasts contain circular DNA
F1 particles present in mitochondria are
Episomes
Oxysomes
Microsomes
Spherosomes
Which of the following statement is not true with reference to mitochondria?
They contain DNA
They store and release chemical energy
They contain ribosomes
They divide in synchrony with cell cycle
Plastids develop from:
Vacuole
Nucleus
Proplastids
Cell wall
The function of aleuroplast is to:
Store fat
Absorb water
Store starch
Store protein
The stack of vesicles found inside plastids is:
Stroma
Thylakoid
Granum
Oxysome
Cell organelle common in Protista and Monera is:
Vacuole
Ribosome
Lysosome
Chloroplast
Ribosomes are classified according to their:
Size
Weight
Volume
Sedimentation rate
All plastids have similar structure because they can:
Store starch, lipid and proteins
Be present together
Perform same function
Get transformed from one type to another
The larger subunit in 80S ribosome is:
50S
60S
70S
40S
Of the following organelles, which group is involved in manufacturing substances needed by the cell?
Ribosome, rough ER, smooth ER
Rough ER, microtubule, lysosome
Lysosome, vacuole, ribosome
Smooth ER, lysosome, Vacuole
The vacuole in the plant cell contains:
Stroma
Matrix
Tonoplast
Cell sap
The cell nucleus was discovered by:
C. de Duve
R. Virchow
R. Hooke
R. Brown
The nucleus is separated from surrounding cytoplasm by a nuclear membrane which is:
Single layered with pores
Double layered with pores
Single layered without pores
Double layered without pores
Nuclear membrane disappears during mitosis at:
Telophase
Anaphase
Late prophase
Early prophase
One key function of nuclear pores is to:
Aid in the production of new nuclei
Allow cells to communicate with each other
Form connections between different organelles
Allow molecules like proteins to move in and out of the nucleus
Nucleolus in eukaryotic cells is:
Visible in metaphase
Bounded by a membrane
The site for synthesis of RNA polymerase
The site for packaging of rRNA with ribosomal proteins
Which of the following is a part of endomembrane system of eukaryotic cell?
Peroxisomes
Chloroplasts
Golgi complex
Mitochondria
Lysosomes are believed to originate from:
SER
Mitochondria
Golgi complex
Food vacuole
