NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A bacterium will construct different proteins to metabolize the sugars lactose or glucose, depending on which one it detects in the outside environment. What part of the bacterium allows it to recognize different substances in the outside environment?
A
nucleus
B
lysosomes
C
cell membrane
D
endoplasmic reticulum
Explanation: 

Detailed explanation-1: -Why is it important that there are different types of proteins in plasma membranes for the transport of materials into and out of a cell? The proteins allow a cell to select what compound will be transported, meeting the needs of the cell and not bringing in anything else.

Detailed explanation-2: -Ribosomes-Ribosomes are microscopic “factories” found in all cells, including bacteria. They translate the genetic code from the molecular language of nucleic acid to that of amino acids-the building blocks of proteins.

Detailed explanation-3: -Cholesterol: The cholesterol molecules are randomly distributed across the phospholipid bilayer, helping the bilayer stay fluid in different environmental conditions.

Detailed explanation-4: -Phospholipid bilayers are critical components of cell membranes. The lipid bilayer acts as a barrier to the passage of molecules and ions into and out of the cell.

There is 1 question to complete.