Mississippi State Biology Practice Test 1

Two safety features found in most laboratories are a safety shower and a safety fountain with two water jets. What is the main purpose of the safety fountain?

• To irrigate the nostrils if fumes are inhaled

• To rinse the mouth if chemicals are ingested

• To wash the hands if exposed to toxic material

• To flush the eyes if contaminated with chemicals

A diagram of a food web is shown below

Which organism in the food web receives the least amount of energy from the producers?

• Hawk

• Rabbit

• Grasshopper

• Mouse

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An unmutated segment of DNA containing 40 molecules of adenine will contain an equal number of which of the following?

• Uracil

• Cytosine

• Guanine

• Thymine

Which of the following explains the role enzymes play in the process of digestion?

• They assure that digestion occurs within hours instead of days

• They improve the peristaltic movement of the intestines during digestion

• They increase the amount of acid released from the stomach.

• They prevent lipids from being absorbed into the blood stream.

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What is the main function of a vacuole?

• Storage of water

• Synthesis of energy

• Replication of DNA

• Formation of proteins

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Which of the following introduces carbon dioxide into the carbon cycle?

• Using a windmill to pump water

• Absorbing solar energy

• Burning organic material

• Generating hydroelectric power

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Which of the following carries amino acids to the site of protein synthesis?

• mRNA

• rRNA

• tRNA

• nRNA

. Which of the following is a characteristic of both a prokaryotic cell and a eukaryotic cell?

• Both cells lack a nucleus.

• Both cells undergo meiosis.

• Both cells contain a mitochondrion.

• Both cells contain genetic material.

Scientists can determine similarities or differences between two species by preparing DNA gels from each species and comparing which of the following?

• Color of the segments

• Pattern of the segments

• Radioactivity of the segments

• Relative width of the segments

Mycorrhiza is a symbiotic relationship between plant roots and fungi. The fungi grow around the plant roots and increase the surface area for the absorption of water and nutrients by the plant. The plant roots, in turn, provide nutrients for the fungi. What type of symbiotic relationship is mycorrhiza?

• Commensalism

• Competition

• Parasitism

• Mutualism

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