A Researcher Who Is Interested in Studying the Effects of the Amount

question 70

Multiple Choice

A researcher who is interested in studying the effects of the amount of study time on exam anxiety selects a group of students to take part in her study. One group of students is allowed 10 hours of study time and a second group is allowed 20 hours of study time. Immediately before the exam, the researcher assesses each student's level of anxiety by measuring their blood pressure and heart rate. In this study, the independent variable is the ________, and the dependent variable is the ____________.

• A)amount of study time; level of exam anxiety
• B)level of exam anxiety; amount of study time
• C)level of exam anxiety; the student's grade on the exam
• D)the length of time the student spent writing the exam; number of correct answers on the exam
• E)Amount of study time; the number of groups

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Definitions:

tRNA Molecule

Transfer RNA; a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein during protein synthesis.

Anticodon

A sequence of three nucleotides forming a unit of genetic code in a transfer RNA molecule, corresponding to a complementary codon in messenger RNA.

Amino Acid

Organic molecule composed of an amino group and an acid group; covalently bonds to produce peptide molecules.

DNA Sequence

The order of nucleotides in a segment of DNA, determining genetic information.