About 250 million years ago Earth’s continents merged into one supercontinent called ____
a. Nazca
b. Eurasia
c. Laurasia
d. Gondwana
e. Pangaea
ANSWER: e
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Which of the following would not be synthesized on the endoplasmic reticulum?
A. cytoskeletal proteins B. lipids C. pump proteins D. lysosomal proteins
Phosphofructokinase is an allosteric enzyme in the glycolysis pathway. Regulation of glycolysis is directly related to the level of ATP and citrate. If ATP or citrate levels are high, phosphofructokinase will be inhibited
What will happen to this enzyme when ATP levels drop? A. Phosphofructokinase will be inhibited. B. Phosphofructokinase will be activated. C. Metabolism of citrate will be inhibited. D. Metabolism of phospholipids will be activated. E. Metabolism of phospholipids will be inhibited.
Suspension filter feeding animals capture food particles that are:
A. floating in the water around them. B. laying on the surface of the sea floor. C. attached to rocks or other hard surfaces. D. buried within the sediments. E. All of the answer options are correct.
Which hormone is responsible for increasing blood calcium levels?
a. insulin b. glucagon c. parathyroid hormone d. calcitonin