PCAT

PCAT practice questions, page 10 of 12, with answer review and explanations.

Question 46

Which of the following is found in the plasma membrane of a cell?

  1. phospholipid
  2. glycoprotein
  3. cholesterol
  4. all of the above

Question 47

Which of the following should be added to denature a protein all the way back to primary structure?

  1. reducing agent
  2. oxidizing agent
  3. water
  4. ether

Question 48

What is the role of a nurse cell?

  1. secrete testosterone
  2. secrete sperm
  3. nurture maturing red blood cells
  4. activate sperm motility

Question 49

The breakdown of a disaccharide releases energy which is stored as ATP. This is an example of a(n):

  1. Thermodynamic reaction
  2. Exothermic reaction
  3. Combination reaction
  4. Replacement reaction
  5. Endothermic reaction

Question 50

Which of the following molecules is thought to have acted as the first enzyme in early life on earth?

  1. Protein
  2. RNA
  3. Triglycerides
  4. Phospholipids
  5. DNA