Unit 2 Biochemistry

Which of the follwing are characteristics shared by all living organisms?

• Made of cells

• Capable of reproducing

• Having a universal genetic code

• Growth and development

• Performing photosynthesis

Tags

NGSS.MS-LS1-1

Which of the follwing are characteristics shared by all living organisms?

• Obtaining and using energy and materials

• Maintaining a stable internal environment (Homeostasis)

• Respond to stimuli

• As a group, changing over time

• Breathing

Tags

NGSS.MS-LS2-1

A way to remember the eight characteristics common to all living things is "Chris Rock Can Go Over Rainbows Making Children."

• True

• False

There are six elements that form substances essential for life. Which of the following choices lists these elements correctly?

• carbon, hydrogen, oxygen, magnesium, sulfur, and sodium

• carbon, hydrogen, oxygen, nitrogen, sulfur, and neon

• carbon, hydrogen, oxygen, phosphorus, sulfur, and calcium

• carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur

The presence of which element makes a compound organic?

• nitrogen

• carbon

• oxygen

• hydrogen

1 point)

Examine the structural formulas shown above. These structural formulas show molecules that are important to living organisms. Which molecule is inorganic and why?

• Molecule c because it contains the element carbon.

• All of the molecules are inorganic because they contain the element oxygen.

• Molecule a because it was formed from both ionic and covalent bonding.

• Molecule b because it doesn’t contain the element carbon.

Tags

NGSS.MS-PS1-1

Carbon is an essential element found in all compounds necessary for life. What makes carbon “special?”

• Carbon forms strong ionic bonds with non-metals making the resulting organic compounds highly stable.

• Carbon has one valence electron, so it is highly reactive with non-metals such as hydrogen and oxygen.

• Carbon has four valence electrons and likes to bond covalently with itself and other non-metals like hydrogen, oxygen, and nitrogen.

• Carbon is a metal, and metals are important structural components of organic compound

Tags

NGSS.HS-PS1-1

Which of the following describes the 4 groups of organic macromolecules/polymers found in living things?

• oxygen, lipids, proteins and fats

• carbohydrates, proteins, lipids and nucleic acids

• carbon, hydrogen, proteins and lipids

• carbohydrates, DNA, RNA and oils

Monomers are joined together to form complex polymers (macromolecules) during an important chemical reaction that occurs in cells. This reaction is shown in the diagram above.

The name of this process is _____ and occurs when a molecule of water is ____.

• hydrolysis, lost (pulled out)

• dehydration synthesis, lost (pulled out)

• dehydration synthesis, added

• hydrolysis, added

Tags

NGSS.HS-LS1-6

Macromolecules can be broken down in cells to release energy or provide building blocks for growth and repair. This reaction is shown in the diagram above where a polymer is being separated back into its monomers. The name of the process shown above is _____ and occurs when a molecule of water is ____.

• hydrolysis, shared

• hydrolysis, evaporated

• hydrolysis, added

• hydrolysis, lost (pulled out)