PMA 2- Review

The table compares four types of microscopes and their functional abilities. Which of the following represents and Scanning Electron Microscope?

• Microscope A

• Microscope B

• Microscope C

• Microscope D

The table compares four types of microscopes and their functional abilities. Which of the following represents and Compound Light Microscope?

• Microscope A

• Microscope B

• Microscope C

• Microscope D

Non-Renewable resources are also known as what?

• Fossil Fuels
• Renewable
• Solar Energy
• Hydroelectric Energy

Why are fossil fuels considered non-renewable resources if they are still forming beneath the surface today?

• They are being formed as a type of methane which we cannot use.

• They are being formed too far beneath the surface.

• We are depleting the fossil fuels much faster than they can form.

What is one DISADVANTAGE of using fossil fuels?

• Fossil fuels will never run out.

• Fossil fuels are very efficient forms of energy and are readily available, making them cheaper.

• Burning fossil fuels contributes to the greenhouse effect which causes global warming.

• Fossil fuels are better for the environment.

Match the following

• Medium power, views cells & organelles

• Transmission Electron Microscope (TEM)

• High power, objects cannot be alive, used to see the surface of objects in detail

• Compound Light Microscope

• Very high power, objects cannot be alive, used to see the inside of objects in detail

• Scanning Electron Microscope (SEM)

• Lowest power, 3-D image, objects must be solid

• Dissecting Microscope

Which of the following correctly traces the energy transfer through the trophic levels in the

marine food web shown below?

• Fish --> sea birds --> seal --> penguin

• Phytoplankton --> krill --> fish --> seal

• Seal --> sea birds --> fish --> phytoplankton

• Zooplankton --> phytoplankton --> krill --> squid

The activities that take place to meet human needs can often be harmful to ecosystems. By

developing sustainable practices, however, we can help protect our environment. Which of the

following changes would be most helpful in reaching sustainability?

• Using natural gas for fuel instead of burning petroleum

• Tilling soil to improve soil fertility and increase crop production

• Planting trees to replace those that are cut down by logging

• Building more water treatment facilities

Answer explanation

Remember:

Natural gas is another type of fossil fuel like petroleum. All other options focus on treatment of things already being harmed. The only option that actually offers a solution is C.

Which of the following best compares the structures of lipids and carbohydrates?

• Both are made up of monosaccharide monomers, but lipids are hydrophobic and

  carbohydrates are hydrophilic.

• Both consist of carbon, hydrogen, and oxygen, but carbohydrates have repeating structural

  units and lipids do not.

• Both contain carbon and hydrogen, but carbohydrates also contain oxygen and lipids contain

  nitrogen.

• Both have a carbon backbone, but lipids also have an amino group and carbohydrates have a

  carboxylic acid group.

Answer explanation

Oil is an example of a lipid. Is oil something that dissolves in water?

Which of the following best describes the difference between the functions of nucleic acids and

enzymes?

• Nucleic acids are used as the building blocks of proteins, while enzymes are used as the

  building blocks of phospholipids.

• Nucleic acids contain the genetic code for protein synthesis, while enzymes catalyze chemical

  reactions.

• Nucleic acids inhibit biochemical reactions, while enzymes provide structural support in cells.

• Nucleic acids transmit signals that begin biochemical processes, while enzymes convert

  carbohydrates into lipids and proteins.

Answer explanation

Nucleic acids like DNA hold the instructions to make proteins (and everything else in your body). Enzymes speed up chemical reactions (they are catalysts)