CONCEPTS & THEORIES of Cell Wall
QUESTIONS
Cell Wall Multiple Choice Questions(MCQs) and Answers
1
Plant cell wall is made up of
Answer: Cellulose, hemicelluloses and pectin
2
Middle lamella is made up of pectin. Pectin is chemically
Answer: Glucoronic and galacturonic acid
3
Which of the following statements are true regarding cellulose synthesis
Answer: All of these
4
Which of the following groups has cell wall
Answer: Bacteria, fungi and plants
5
What organism lacks cell wall?
Answer: Protozoa
6
The cell wall of diatoms composed of __________
Answer: Biogenic silica
7
Peptidoglycan layer is present in large quantity in?
Answer: Gram-positive bacteria
8
NAG and NAM of peptidoglycan layer is linked by _________
Answer: beta-(1,4) glycosidic linkage
9
Bayer’s junctions are sites which help in joining which of the following?
Answer: cytoplasmic membrane and outer membrane
10
Bacterial cell wall is made up of
Answer: N-acetyl glucosamine, N-acetyl muramic acid and amino acids
11
Chlorzinc Iodide is used to stain
Answer: Cellulose
12
Which component is present in the cell wall of fungi?
Answer: Chitin
13
Which of the following antibiotics have their mode of action of inhibition of cell wall synthesis?
Answer: β-lactams
14
What is S- layer?
Answer: Surface layer
15
Which of the following bacteria lacks cell wall?
Answer: Mycoplasma pneumoniae
16
Which of the statements are incorrect regarding plant cell wall
Answer: Primary and secondary walls are present in meristamatic cells
17
Bacteria can be divided into classes namely gram-positive bacteria and gram-negative bacteria based on their cell wall.
Answer: True
18
Which of the following is a aromatic polymer of phenols
Answer: Lignin
19
Which of the following statements are not true regarding cell wall
Answer: Cell was is semi-permeable
20
Chitinous cell wall is present in
Answer: Mitochondria without outer membrane
21
Pectin is stained using
Answer: Ruthenium red
22
Cellulose is a polymer of D-glucose units joined by
Answer: β 1-4 linkage
23
Fine cytoplasmic connections between neighbouring cells through the cell wall for cell to cell communication is called
Answer: Plasmodesmata
24
Which of the following organelle is involved in cell wall synthesis
Answer: Golgi apparatus
25
Secondary cell wall of plants is
Answer: SLocated inside the primary wall tarch
26
What is present in the cell wall of Mycobacterium tuberculosis?
Answer: Mycolic acid
27
Which of the following cell wall component can effectively defend against lysozyme?
Answer: Pseudomurein
28
Peptidoglycan is made up of __________
Answer: N-acetylglucosamine, N-acetylmuramic acid, amino acids
29
Teichoic acid present in Gram-positive bacteria can bind to which ion?
Answer: Mg ions
30
Cord factor is a ___________
Answer: teichoic acid derivative
31
The outer membrane of the Gram-negative cell wall is anchored to the underlying peptidoglycan by means of which of the following?
Answer: Braun’s Lipoprotein
32
Which among the following acts as receptors for bacteriophage attachment in Gram-negative bacteria?
Answer: O antigens
33
Porins are special proteins act as channels in the outer membrane of Gram-negative bacteria.
Answer: True
34
Gram-negative bacteria are more resistant to antibiotics due to the presence of?
Answer: Outer lipopolysaccharide layer
35
Which of the following are present in teichoic acids?
a) ribitol residues
b) glycerol residues
c) glucose residues
d) ribitol or glycerol residues
View Answer
Answer: d
Answer: Nucleolus