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plz send me 1 marks important question answer of chapter cell of class 11th
Answers
Multiple choice questions
A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is
a. Absence of mitochondria
b. Presence of cell wall
c. Presence of haemoglobin
d. Absence of nucleus
Select one which is not true for ribosome
a. Made of two sub units
b. Form polysome
c. May attach to m RNA
d. Have no role in protein synthesis
Which one of these is not a eukaryote?
a. Euglena
b. Anabaena
c. Spirogyra
d. Agaricus
Which of the following dyes is best suited for staining chromosomes?
a. Basic Fuchsin
b. Safranin
c. Methylene blue
d. Carmine
Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the followings
i. Mycoplasma
ii. Ostrich eggs
iii. Human RBC
iv. Bacteria
Options:
a. i, iv, iii & ii
b. i, ii, iii & iv
c. ii, i, iii & iv
d. iii, ii, i & iv
Which of the following features is common to prokaryotic and many eukaryotes?
a. Chromosomes present
b. Cell wall present
c. Nuclear membrane present
d. Sub cellular organelles present
Who proposed the fluid mosaic model of plasma membrane?
a. Camillo Golgi
b. Schleiden and Schwann
c. Singer and Nicolson
d. Robert Brown
Which of the following statements is true for a secretory cell?
a. Golgi apparatus is absent
b. Rough Endoplasmic Reticulum (RER) is easily observed in the cell
c. Only Smooth Endoplasmic Reticulum (SER) is present
d. Secretory granules are formed in nucleus.
What is a tonoplast?
a. Outer membrane of mitochondria
b. Inner membrane of chloroplast
c. Membrane boundry of the vacuole of plant cells
d. Cell membrane of a plant cell
Which of the following is not true of a eukaryotic cell?
a. It has 80S type of ribosome present in the mitochondria
b. It has 80S type of ribosome present in the cytoplasm
c. Mitochondria contain circular DNA
d. Membrane bound organelles are present
Which of the following statements is not true for plasma membrane?
a. It is present in both plant and animal cell
b. Lipid is present as a bilayer in it
c. Proteins are present integrated as well as loosely associated with the lipid bilayer
d. Carbohydrate is never found in it
Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
a. Presence of two layers of membrane
b. Presence of ribosome
c. Presence of chlorophyll
d. Presence of DNA
Which of the following is not a function of cytoskeleton in a cell?
a. Intracellular transport
b. Maintenance of cell shape and structure
c. Support of the organelle
d. Cell motility
The stain used to visualise mitochondria is
a. Fast green
b. Safranin
c. Aceto carmine
d. Janus green
Very Short Answer Type Questions
What is the significance of vacuole in a plant cell?
What does ‘S’ refer in a 70S & an 80S ribosome?
Mention a single membrane bound organelle which is rich in hydrolytic enzymes.
What are gas vacuoles? State their functions?
What is the function of a polysome?
What is the feature of a metacentric chromosome?
What is referred to as satellite chromosome?