Plasma Membrane

Q. Explain the structure of cell membrane.

Q. In addition to the cell membrane, there is an outer thick layer in plant cells which is known as ___.

1. cell wall
2. plasma membrane
3. tonoplast
4. nuclear membrane

Q. Which of the following statement is true about passive transport?

1. Energy is not required for passive transport to take place.
2. It refers to the transport of substance from lower
   concentration areas to higher concentration areas.
3. Only oxygen can be transported through diffusion.

Q.

What is the composition of the cell membrane?
How do molecules move in this selectively permeable membrane? [3 MARKS]

Q. Choose the correct statements with respect to plasma membrane.

1. It is selectively permeable.
2. It is the outermost layer of plant cells.
3. Proteins are stacked between the lipid bilayer.
4. It consists of a lipid bilayer.

Q. Each phospholipid in the plasma membrane bilayer has

1. Hydrophobic heads and Hydrophilic tails
2. Hydrophilic heads and Hydrophobic tails
3. Both the head and the tail are hydrophilic
4. Both the head and the tail are hydrophobic

Q. Which among the following controls the movement of substances in and out of the cell?

1. Cytoplasm
2. Cell membrane
3. Mitochondrion
4. Nucleus

Q. Diffusion takes place through a semi-permeable membrane.

1. True
2. False

Q.

The plasma membrane is composed of-

1. Lipids
2. Cellulose
3. Starch
4. Proteins

Q. Explain the structure of cell membrane.

Q. The shape of a cell depends on the ___.

1. function of the cell
2. size of the organism
3. shape of the organism
4. habitat of the organism

Q.

Which of the following best describes the structure of the plasma membrane?

1. Proteins embedded in two layers of phospholipid.
2. Proteins sandwiched between two layers of phospholipid.
3. A layer of protein coating a layer of phospholipid.
4. Phospholipids embedded in two layers of protein.

Q. Which among the following controls the movement of substances in and out of the cell?

1. Cytoplasm
2. Cell membrane
3. Mitochondrion
4. Nucleus

Q. Plasma membrane is made up of two layers of and the protein molecules are embedded in it.

1. lipid
2. carbohydrates
3. cytoplasm
4. ribosomes
5. lysosomes

Q. Plasma membrane is made up of two layers of and the protein molecules are embedded in it.

1. lipids
2. carbohydrates
3. cytoplasm
4. ribosomes
5. lysosomes

Q. Substances like carbon dioxide and oxygen move across the cell membrane by the process of___.

1. transpiration
2. diffusion
3. respiration
4. photosynthesis