Question 1

Which of the following best describes the smallest unit of life?

Accepted Answer

A cell

Question 2

Which kingdom do single-celled organisms with considerable internal complexity, such as paramecia, belong to?

Accepted Answer

Protista

Question 3

Which of the following is NOT a difference between prokaryotes and eukaryotes?

Accepted Answer

Prokaryotes have a nucleus, eukaryotes do not.

Question 4

Which of the following correctly lists the four steps of the scientific method in order?

Accepted Answer

Observation, Hypothesis, Experiment, Conclusion

Question 5

A student wants to test the effect of a new vitamin supplement on plant growth. Which of the following is the best example of a hypothesis?

Accepted Answer

If plants are given the vitamin supplement, then they will grow taller than plants not given the supplement.

Question 6

Which of the following best defines an independent variable in a scientific experiment?

Accepted Answer

The variable that is deliberately changed by the experimenter.

Question 7

Which of the following is NOT a criterion for judging the reliability of a scientific report?

Accepted Answer

The reputation of the author

Question 8

Which of the following is NOT one of the four major groups of biological macromolecules?

Accepted Answer

Vitamins

Question 9

What is the principal function of carbohydrates in living organisms?

Accepted Answer

Providing energy

Question 10

A substance tested with iodine turns light orangish-brown, with biuret remains clear blue, and with Benedict's turns orange and cloudy. What is the most likely composition of this substance?

Accepted Answer

It contains simple sugars

Question 11

Which of the following is NOT one of the three domains of life?

Accepted Answer

Protista

Question 12

What effect does boiling temperature have on the rate of enzymatic reactions?

Accepted Answer

It decreases the rate by denaturing the enzyme.

Question 13

How many calories are in an ounce of butter, assuming 30 grams of fat and using the formula $	ext{Calories} = 	ext{grams of fat} 	imes 9$?

Accepted Answer

$270$

Question 14

Which two measurements would best help you determine the rate of an enzymatic reaction?

Accepted Answer

Change in substrate concentration and product formation over time

Question 15

What effect does the addition of antacid have on the pH of vinegar?

Accepted Answer

It raises the pH

Question 16

How does an acid pH affect the reaction rate of amylase?

Accepted Answer

It decreases the reaction rate

Question 17

Which of the following statements about amylase is correct?

Accepted Answer

Amylase is a protein

Question 18

What happens to the rate of enzymatic reactions when the temperature is ice-cold?

Accepted Answer

The rate decreases

Question 19

What happens when you increase the concentration of enzymes in a reaction?

Accepted Answer

The reaction rate increases until substrate is limiting

Question 20

Which of the following would be considered the substrate in an amylase enzyme experiment?

Accepted Answer

Starch

Introduction to Scientific Method, Biomolecules, and Enzymes: Study Guide

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