EASY
Earn 100

What is sandwich model?

Important Questions on Cell - The Unit of Life

EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
At physiological temperature, sterols in biological membranes:
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Proteins P, Q, and R are associated with an intact organellar membrane in a cell. If the intact organelle is treated with a high ionic strength buffer, only protein R remained associated with the membrane fraction. Based on this, one could conclude that:
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Which of the following statements is incorrect regarding biological membrane?
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Select the incorrect statements from the following
I) In plasma membrane, hydrophilic polar heads of lipids arrange towards the outside and the hydrophobic tail towards the inner side
II) In the plasma membrane, peripheral proteins lie on the surface of the membrane while the integrated proteins are not buried in the membrane
III) Neutral solutes may move across the membrane by the process of simple diffusion against the concentration gradient
IV) Polar molecules can pass through the non-polar lipid bilayer and do not require a carrier protein
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Find the correct statement about the plasma membrane.
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
In beetroot, if kept in cold water, anthocyanin does not come out of the plasma membrane as it is
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
That the cell membrane is selectively permeable can be best deduced by
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Describe the fluid mosaic model of plasma membrane.
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Keeping has viewed the structure of the cell membrane, which one of the following statements is correct with respect to the movements of liquid and proteins from one liquid monolayer to the other (flip flop movement).
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Which of the following four cell structures is correctly matched with the accompanying description?
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
The fluidity of membranes in a plant in cold weather may be maintained by
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Which of the following is characteristic of phospholipids of plasma membrane?
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Read the following statements carefully:-

(A) The lipid component of the plasma membrane mainly consists of phosphoglycerides.
(B) Polar molecules can pass through the lipid bilayer of the plasma membrane, therefore they do not require carrier proteins to facilitate their transport.
(C) The secondary wall is capable of growth and it is formed on the outer side of the primary wall.
(D) Quasifluid nature of lipid enables the lateral movement of proteins within the overall lipid bilayer of the plasma membrane.
(E) Middle lamella glues the different neighbouring cells together.

How many statements are incorrect?
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Parchment paper is
HARD
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Man and mouse cells are treated with red and green fluorescent dyes separately and are made to fuse. The resultant cells when kept at 37°C, the distribution of dye on the surface of cell will be a shown below
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Singer and Nicholson's model of plasma membrane differs from Robertson's model in the
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Fluid mosaic model of plasma membrane shows that
EASY
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Cotyledons are also called-
MEDIUM
Biology>Cell: Structure and Function>Cell - The Unit of Life>Cell Membrane: Structure and Functions
Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flipflop movement)?