Name: ___________________

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1. Which one of the following best defines homeostasis as it relates to living cells?

a. tendency to reproduce rapidly
b. tendency to grow too fast for the DNA to be able to function properly
c. tendency to convert carbon dioxide to glucose
d. tendency to maintain a stable internal environment of pH and temperature

(The correct answer is "tendency to maintain a stable internal environment of pH and temperature.")

2. Which one of the following is expected to be largest in size?

a. molecule of glucose
b. prokaryotic cell
c. carbon atom
d. eukaryotic cell

(The correct answer is "eukaryotic cell.")

3. The formal "scientific name" for living things has a first part (the Genus), and a second part (the Species within the Genus). The Genus for humans is Homo, and the Species name within Homo for humans is Sapiens. Therefore, the correct scientific name for humans is which one of the following?

a. Sapiens
b. Homos
c. Sapiens Homo
d. Homo Sapiens

(The correct answer is "Homo Sapiens.")

4. Which category of classification has the largest variety of organisms?

a. Kingdom
b. Phylum
c. Genus
d. Species

(The correct answer is "Kingdom.")

5. The DNA and RNA molecules are which one of the following four macromolecules?

a. proteins (long chain of amino acids)
b. nucleic acids (long chain of nucleotides and base pairs)
c. lipids (fats)
d. carbohydrates (starches, sugars, and glucose)

(The correct answer is "nucleic acids.")

6. Cells package their DNA very carefully into a specific structure. This structure, which makes it possible to separate DNA precisely during cell division, is called which one of the following?

a. chloroplast
b. chlorophyll
c. carbohydrate
d. chromosome

(The correct answer is "chromosome.")

7. An organism that uses the sun to produce energy-rich molecules (or glucose) is called which one of the following?

a. carnivore
b. decomposer
c. producer
d. herbivore

(The correct answer is "producer.")

8. Which one of the following best describes a rat?

a. autotroph and producer
b. autotroph and consumer
c. heterotroph and producer
d. heterotroph and consumer

(The correct answer is "heterotroph and consumer.")