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Question 1 (2 points)

A group of medical researchers investigated the effects of a drug called PDX on lowering blood pressure in a group of women between the ages of 60 and 80 years old. The researchers did the following experiment and obtained the indicated results: One group of 150 women took a tablet containing PDX for 3 weeks – 95 of these women experienced decreased blood pressure by at least 10%. Another group of 150 women were given a tablet with no added PDX (placebo) for 3 weeks – 10 of these women decreased their blood pressure by 10%. What are the (1) independent and (2) dependent variables in this experiment?

Question 1 options:

1. Blood pressure; 2. PDX

1. Blood pressure; 2. Placebo

1. PDX; 2. blood pressure

1. The 3 week time period; 2. sample size of 150

1. PDX; 2. sample size of 150

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Question 2 (1 point)

Which macromolecule is the primary energy source for organisms?

Question 2 options:

A)    Sunlight

B)    Protein

C)    Fat

D)    Carbohydrate

E)    Nucleic acid

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Question 3 (1 point)

You examine a cell under a microscope and you do not see a well-defined nucleus. What type of cell is this?

Question 3 options:

Prokaryotic

Eukaryotic

Plant

Animal

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Question 4 (1 point)

What is the atomic number of an element with 6 protons, 7 neutrons and 6 electrons?

Question 4 options:

7

13

6

12

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Explanation / Answer

2) The answer is option (d) carbohydrates.. It is defined as the primary and the first source of energy of body..!! Like glucose..

3) the answer is option (a) prokaryotic cell.. It is the feature of the prokaryotic organism that they do not have a well defined nucleus and nuclear membrane..!!

4) the answer is option (c) 6..the atomic no is determined by the no of electrons in the atom. Wheraes the atomic mass is determined by the no of protons + no of neutrons..!!

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