The Daily Item, Sunbury, PA

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December 1, 2012

Keystone biology: Are you smarter than an 11th-grader?

Pass the test and graduate from high school!

Are you smarter than an 11th-grader?

Could you pass the newest state test needed in order to graduate from high school? Take a sample test in biology of the new Keystone Exams, which have replaced the Pennsylvania System of School Assessment tests. Students will need to pass the tests before they can graduate from high school. Answers at bottom:



Pennsylvania Keystone Biology Item Sampler 2011

1. Which statement best describes a difference between prokaryotic cells and eukaryotic cells?

A. The presence of both DNA and ribosomes in prokaryotic cells indicates that they are more complex than eukaryotic cells.

B. The larger size of prokaryotic cells indicates that they are more complex than eukaryotic cells.

C. The presence of membrane-bound organelles in eukaryotic cells indicates that they are more complex than prokaryotic cells.

D. The larger size of eukaryotic cells indicates that they are more complex than prokaryotic cells.

2. Alveoli are microscopic air sacs in the lungs of mammals. Which statement best describes how the structure of the alveoli allows the lungs to function properly?

A. They increase the amount of energy transferred from the lungs to the blood.

B. They increase the flexibility of the lungs as they expand during inhalation.

C. They increase the volume of the lungs, allowing more oxygen to be inhaled.

D. They increase the surface area of the lungs, allowing efficient gas exchange.

3. Which statement best compares the energy transformations of photosynthesis and cellular respiration?

A. Only photosynthesis uses oxygen to create energy.

B. Only photosynthesis causes an increase in kinetic energy.

C. Photosynthesis and cellular respiration both store energy in chemical bonds.

D. Photosynthesis and cellular respiration both require chemical energy to make food.

4. Which type of organic molecule was most likely formed by the scientist in the laboratory?

A. lipid

B. protein

C. nucleic acid

D. carbohydrate

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