NCERT Class 11- Biology: Chapter – 8 the Unit of Life Part 1
Doorsteptutor material for CBSE/Class-8 is prepared by world's top subject experts: get questions, notes, tests, video lectures and more- for all subjects of CBSE/Class-8.
Multiple Choice Questions
Question 1:
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
Answer: (c)
Question 2:
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 protien synthesis
Answer: (d)
Question 3:
Which one of the following is not a connective tissue?
Which one of these is not a eukaryote?
a. Euglena
b. Anabena
c. Spirogyra
d. Agaricus
Answer: (b)
Question 4:
Which of the following dyes is best suited for staining chromosomes?
a. Basic Fuchsin
b. Safranin
c. Methylene blue
d. Carmine
Answer: (d)
Question 5:
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
Answer: (a)
Question 6:
Which of the following features is common to prokaryotes and many eukaryotes?
a. Chromosomes present
b. Cell wall present
c. Nuclear membrane present
d. Sub cellular organelles present
Answer: (b)
Question 7:
Who proposed the fluid mosaic model of plasma membrane?
a. Camillo Golgi
b. Schleiden and Schwann
c. Singer and Nicolson
d. Robert Brown
Answer: (c)
Question 8:
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.
Answer: (b)
Question 9:
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 cellc.
Answer: (c)