Questions Below Will Be Bases on the Following Study: a Researcher

question 9

Multiple Choice

Questions below will be bases on the following study: A researcher wishes to test whether the drug, magnesium pemoline, has any influence on intelligence. Two groups of subjects are randomly selected from the population of Omega University students. Group A is given the magnesium pemoline and then tested on the Stanford-Binet IQ test. Group B is given a placebo and, then, also tested on the Stanford-Binet. Both groups are tested under identical environmental conditions.
-If the IQ scores in Group A had been significantly higher than those in Group B, we may conclude that

• A) the magnesium pemoline probably caused an increase in IQ scores
• B) the magnesium pemoline probably caused a decrease in IQ scores
• C) cause and effect statements cannot be inferred from this study
• D) none of these

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Definitions:

Calvin Cycle

A set of chemical reactions that take place in the chloroplasts of photosynthetic organisms to synthesize glucose from carbon dioxide and water, using ATP and NADPH produced in the light reactions.

Rubisco

An enzyme involved in the first major step of carbon fixation, a process by which atmospheric carbon dioxide is converted by plants to energy-rich molecules.

Photorespiration

The process that reduces the efficiency of photosynthesis in C3 plants during hot spells in summer; consumes oxygen and produces carbon dioxide through the degradation of Calvin cycle intermediates.

Rubisco

An enzyme that catalyzes the first step of carbon fixation in the process of photosynthesis.