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Practice each question, then open the answer or worked solution.
A common characteristic feature of plant sieve tube cells and most of
the mammalian erythrocytes is
a. Absence of mitochondria
b. Presence of cell wall
c. Presence of haemoglobin
d. Absence of nucleus
Option (d) is the answer.
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
Option (d) is the answer.
Which one of these is not a eukaryote?
a. Euglena
b. Anabaena
c. Spirogyra
d. Agaricus
Option (b) is the answer.
Which of the following stains is not used for staining chromosomes?
a. Basic Fuchsin
b. Safranin
c. Methylene green
d. Carmine
Option (b) is the answer.
Different cells have different sizes. Arrange the following cells in an
ascending order of their size. Choose the correct option among the
following
i. Mycoplasma
ii. Ostrich eggs
iii. Human RBC
iv. Bacteria
Options:
a. i, iv, iii & ii
b. i, iii, iv & ii
c. ii, i, iii & iv
d. iii, ii, i & iv
Option (a) is the answer.
Which of the following features is common to prokaryotes and many
eukaryotes?
a. Chromatin material
b. Cell wall present
c. Nuclear membrane present
d. Membranes-bound sub-cellular organelles present
Option (b) is the answer.
Who proposed the fluid mosaic model of the plasma membrane?
a. Benda
b. Schleiden and Schwann
c. Singer and Nicolson
d. Robert Brown
Option (c) is the answer.
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 the nucleus.
Option (b) is the answer.
What is a tonoplast?
a. The outer membrane of mitochondria
b. The inner membrane of chloroplast
c. Membrane boundary of the vacuole of plant cells
d. The cell membrane of a plant cell
Option (c) is the answer.
Which of the following is not true of a eukaryotic cell?
a. The cell wall is made up of peptidoglycans
b. 80S type of ribosomes is present in the cytoplasm
c. Mitochondria contain circular DNA
d. Membrane-bound organelles are present
Option (a) is the answer.