Biology, asked by sayyadarman42, 4 months ago

117. Who proposed fuld mosale model for
plasma membran
a) Singer and Nicholson
b) Cramer and Naegli
() Dentelli and Davaon
d) Robertson
118. Each phospholipid molecule in lipid layer consist
of
a) Head
b) Head and tail
O Head and two talla
d) Two heads and one tail
119. Head and tail of phospholipid molecules are
a) Hydrophille b) Hydrophoble
Hydrophobic and hydrophilic respectively
d) Hydrophilic and hydrophobic respectively
120. Thickness of lipid layer is about
a) 20A
b) 30A
4 45A
d) 60A
121. According to fluid mosaic model, plasma
membrane is made up of
a) Cellulose and hemicellulose
b) Phospholipid and Intergrate protein
C) Phospholipid and extrinske protein
d) Phospholipid, extrinsic and intrinsic protein
122. Nature of plasma membrane is
a) Permeable
b) Semipermeable
) Impermeable d) Transperant
123. Membrane proteins are held in the bilayer mainly
by
a) Hydrophobic attraction
b) tonic bonds
.) Covalent bonds
d) Hydrophilic attraction
124, Extrinsic proteins in bilayer are
a) Peripheral b) Loosely arranged
c) Easily removed d) All of these
125. Intrinske proteins in bilayer are
a) Embedded
b) Tightly bound
c) Can not be removed d) All of these
126. Proteins found in bilayer are
a) Globular
b) Circular
c) Lens like
d) Discoid
127. The types of proteins present in bilayer are
a) Intrinsic
b) Extrinsic
c) Tunnel
d) All of these

Answers

Answered by latharamesh391

Answer:

117. Who proposed fuld mosale model for

plasma membran

a) Singer and Nicholson

b) Cramer and Naegli

() Dentelli and Davaon

d) Robertson

118. Each phospholipid molecule in lipid layer consist

a) Head

b) Head and tail

O Head and two talla

d) Two heads and one tail

119. Head and tail of phospholipid molecules are

a) Hydrophille b) Hydrophoble

Hydrophobic and hydrophilic respectively

d) Hydrophilic and hydrophobic respectively

120. Thickness of lipid layer is about

a) 20A

b) 30A

4 45A

d) 60A

121. According to fluid mosaic model, plasma

membrane is made up of

a) Cellulose and hemicellulose

b) Phospholipid and Intergrate protein

C) Phospholipid and extrinske protein

d) Phospholipid, extrinsic and intrinsic protein

122. Nature of plasma membrane is

a) Permeable

b) Semipermeable

) Impermeable d) Transperant

123. Membrane proteins are held in the bilayer mainly

a) Hydrophobic attraction

b) tonic bonds

.) Covalent bonds

d) Hydrophilic attraction

124, Extrinsic proteins in bilayer are

a) Peripheral b) Loosely arranged

c) Easily removed d) All of these

125. Intrinske proteins in bilayer are

a) Embedded

b) Tightly bound

c) Can not be removed d) All of these

126. Proteins found in bilayer are

a) Globular

b) Circular

c) Lens like

d) Discoid

127. The types of proteins present in bilayer are

a) Intrinsic

b) Extrinsic

c) Tunnel

d) All of these

Explanation:

In an attempt to explain the physical and biological features of cell membranes, two main categories of hypotheses have been proposed, the Bilayer Models and the Micellar or subunit Model. In the bilayer models, the protein and lipid constituting the membrane are believed to occur in layers. In the micellar models, the membrane is believed to consists of a number of similar units or micelles. Some of the important models proposed by various scientists are

Protein-Lipid-Protein Sandwich Model proposed by Danielli-Davson.

Unit Membrane Model proposed by Robertson.

Fluid Mosaic Model proposed by Singer and Nicolson.

Micellar Model was proposed by Hillier and Hoffman.

Lattice model was proposed by Wolpers. Thus, the correct answer is option C.

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