Question

True/False question:

1. The pertussis (whooping cough) vaccine has virtually eliminated whooping cough in the United States.
2. The phospholipids, proteins, and cholesterol in the plasma membrane are firmly bonded to each other via covalent bonds, lending strength and appropriate rigidity to the membrane.
3. Water moves via osmosis from an area with a lower solute concentration to an area with a higher solute concentration.
4. Weight loss typically leads to a reduction in both the number and size of adipocytes.

Answer 1

Questions	True/False	Reasons
The pertussis (whooping cough) vaccine has virtually eliminated whooping cough in the United States.	True	yes it virtually eliminated the pertussis disease because it predominantly improve the immune systems in the patient and decrease the prevalence of diseases.
The phospholipids, proteins, and cholesterol in the plasma membrane are firmly bonded to each other via covalent bonds, lending strength and appropriate rigidity to the membrane.	False	cholesterol is the component of plasma membrane that confers rigidity to the membrane whereas the phospholipids are component of plasma membrane through which a small Polar molecule is most likely to pass. The given statement above is false because cholesterol itself give the membrane rigidity alone.
Water moves via osmosis from an area with a lower solute concentration to an area with a higher solute concentration.	True	because osmosis process is the one where solutes move from lower solute concentration to the higher solute concentration through semipermeable membrane.
Weight loss typically leads to a reduction in both the number and size of adipocytes.	False	When you lose weight, your fat cells start shrinking, releasing lipids and other fats into your bloodstream. Also energy stores are mobilized from adipocytes and it become smaller in size but not number. Because the fact that fat cell number can be increased but not decreased most likely contributes to the body's drive to regain weight after weight loss.