Please refer to Assignments Class 11 Biology Cell The Unit of Life Chapter 8 with solved questions and answers. We have provided Class 11 Biology Assignments for all chapters on our website. These problems and solutions for Chapter 8 Cell The Unit of Life Class 11 Biology have been prepared as per the latest syllabus and books issued for the current academic year. Learn these solved important questions to get more marks in your class tests and examinations.
Cell The Unit of Life Assignments Class 11 Biology
Question. Important site for formation of glycoproteins and glycolipid is :-
(a) Vacuole
(b) Golgi apparatus
(c) Plastid
(d) Lysosome
Answer
B
Question. Which among the following is not a function ofmesosome ?
(a) Synthesis of food
(b) Help in cell wall formation
(c) Help in DNA replication
(d) Distribution of DNA in daughter cells
Answer
A
Question. The fluid nature of the membrane is also important from the point of view of functions like :-
(i) Cell growth
(ii) Formation of intercellular junctions
(iii) Secretions
(iv) Endocytosis
(v) Cell division
(a) i, iii, iv only
(b) ii, iii, v only
(c) i, iii, iv, v only
(d) i, ii, iii, iv, v
Answer
D
Question. The number of mitochondria per cell is variable, depending on :-
(a) Size of cells
(b) Shape of cells
(c) Physiological activity of cells
(d) Type of genes present in mt DNA
Answer
C
Question. Which one of the following is not a component of endomembrane system ?
(a) Endoplasmic reticulum
(b) Golgibody
(c) Lysosome
(d) Vacuole
(e) Nucleus
(a) Both a and c
(b) Only c
(c) d and e both
(d) Only e
Answer
D
Question. Find incorrect statement with regard to centrosome and centrioles :-
(i) Centrosomes are surrounded by amorphous pericentriolar material
(ii) In centrosome, both centrioles lie parallel to each other in which each has an organisation like the cartwheel
(iii) Centrioles are made up of nine unevenly spaced peripheral fibrils of tubulin
(iv) Hub is the central proteinaceous part of centriole
(v) Proteinaceous radial spokes connect hub to peripheral triplets
(a) i,ii, v
(b) only ii
(c) ii, iii
(d) All are correct
Answer
C
Question. Which of the following scientist give the cell theory a final shape ?
(a) Leewenhoek
(b) Schleidin & Schwann
(c) Robert Hooke
(d) Rudolf Virchow
Answer
D
Question. A single human cell has approximately…..long thread of DNA distributed among its….chromosomes:-
(a) 2 cm, 46
(b) 2 metre, 46
(c) 2 cm, 23
(d) 2 metre, 23
Answer
B
Question. Chloroplast of higher plants contains –
(a) Only chlorophyll
(b) Only carotenoids
(c) Both chlorophyll and carotenoids
(d) Phycobillins
Answer
C
Question. Eukaryotes have 80S, while prokaryotes have 70S ribosomes in cytoplasm. Here “S” explains :-
(i) Sedimentation coefficient
(ii) Measure of density
(iii) Measure of size
(a) a only
(b) a and b only
(c) b and c only
(d) a, b and c
Answer
D
Question. Match the following –
| (A) Metacentric | (I) Terminal Centromere |
| (B) Submetacentric | (II) Centromere very close to its end |
| (C) Acrocentric | (III) Centromere sligthly away from the center |
| (D) Telocentric | (IV) Middle centromere |
(a) A-(IV) B-(II) C-(III) D-(I)
(b) A-(IV) B-(III) C-(II) D-(I)
(c) A-(I) B-(II) C-(III) D-(IV)
(d) A-(I) B-(IV) C-(III) D-(II)
Answer
B
Question. Na+/K+ pump is an example of :-
(a) Passive transport
(b) Osmosis
(c) Active transport
(d) Simple diffusion
Answer
C
Question. Depending upon the…….., membrane proteins can be classified as integral or peripheral :-
(a) Size
(b) Sedimentation rate
(c) Ease of extraction
(d) Molecular weight
Answer
C
Question. Carotenoid pigments are found in :-
(a) Chromoplast
(b) Chloroplast
(c) Leucoplast
(d) Both (a) and (b)
Answer
D
Question. Diameter of Golgi cisternae is :-
(a) 0.5 mm 1.0 mm
(b) 0.2 1.0 mm
(c) 1.0 4.1 mm
(d) 10 50 nm
Answer
A
Question. Which of the following scientist explained that cells divided and new cells are formed from pre-existing cells?
(a) Schwann
(b) Schleiden
(c) Rudolf Virchow
(d) Robert Hooke
Answer
C
Question. In prokaryotes like cyanobacteria, besides mesosome other membranous extensions into cytoplasm is/are-
(a) GERL
(b) Chromatophores
(c) Ribosomes
(d) Mitochondria
Answer
B
Question. Which cell organelle divides the intracellular space into two distinct compartments, i.e. luminal (inside) and extra luminal (cytoplasm) compartments ?
(a) Golgibody
(b) Mitochondria
(c) Endoplasmic reticulum
(d) Lysosome
Answer
C
Question. In plasma membrane of human erythrocyte which of the following is ratio of proteins and lipids respectively-
(a) 50 & 50
(b) 60 & 40
(c) 52 & 40
(d) 40 & 52
Answer
C
Question. Select out the wrong statement –
(a) Neutral solute can move according to concentration gradient across the nonpolar lipid bilayer
(b) Water can also move according to concentration gradient across the nonpolar lipid bilayer.
(c) Non polar molecules can not pass through non polar lipid bilayer
(d) Na+ & K+ can move across membrane through active transport
Answer
C
Question. Golgi complex receives proteins for modification from RER at which face –
(a) Cis face
(b) Trans face
(c) Concave face
(d) Maturing face
Answer
A
Question. Nucleolus is the site of –
(a) Synthesis of r – RNA
(b) Synthesis of m – RNA
(c) Synthesis of t- RNA
(d) Synthesis of n- RNA
Answer
A