BIOLOGY 1010 QUESTION SET 20 QUIZ

What is the pH of the human stomach?

Answer: 2

If enzymes could only be used once, a cell would need a lot more of which of the following organelles? Rough endoplasmic reticulum Ribosomes Golgi apparatus All of the above

Answer: All of the Above

Both high (boiling) temperatures and low pH cause enzymes to

Answer: Become denatured

If you were developing a drug to block DNA replication in cancer cells, which enzyme would you target?

Answer: DNA polymerase

True or False: All bacteria are optimized to survive at the same temperature and pH.

Answer: False

Which of the following are products of the enzymatic break down of lactose

Answer: Glucose and Galactose

Why is vinegar used in pickling many foods

Answer: It has a low (acidic) pH

The primary reason we refrigerate food is to

Answer: Slow bacterial growth

Some bacteria are metabolically active in hot springs because....

Answer: Their enzymes have high optimal temperatures.

True or False: Bacteria are subject to natural selection, which results in them being well-adapted to their particular environment.

Answer: True