Biology Keystone Review-Part 1

Which characteristic is shared by both prokaryotes and eukaryotes?

• have organ systems

• make their own food

• contain genetic material

• need oxygen gas to breathe

Which action must occur for an enzyme to catalyze a chemical reaction?

• a competitive inhibitor must first bind to an active site

• a substrate must bind to an active site of the enzyme

• a substrate must bind to an allosteric site of the enzyme

• a noncompetitve inhibitor must first bind to an active site

Carbon can combine with many different elements but frequently combines with oxygen, hydrogen, and nitrogen to form organic molecules. Which statement best explains why carbon is able to form a large number of different molecules?

• carbon forms only ionic bonds

• carbon can form only ring structures

• carbon can form four covalent bonds

• carbon forms small, simple structures

Tags

NGSS.HS-LS1-6

Which statement correctly describes how a protein is formed?

• a monosaccharide bonded to a side chain is broken apart

• amino acids are bonded together in a long chain to form a new molecule

• a molecule containing glycerol bonded to three fatty acids is broken apart

• a nitrogenous base, a sugar, and a phosphate group combine to form a new molecule

Tags

NGSS.HS-LS1-6

Which cell process is best modeled by the diagram?

• osmosis

• exocytosis

• passive transport

• facilitated diffusion

A scientist observed that during the course of a chemical reaction the number of ATP molecules was reduced. What did the scientist most likely learn from the observation?

• the reaction produced water

• the reaction consumed water

• the reaction caused an output of energy

• the reaction required an input of energy

Tags

NGSS.HS-LS1-7

NGSS.HS-PS1-4

Which structure and function are common to all plants and some protists and distinguish them from all animals?

• chloroplasts that conduct photosynthesis

• mitochondria that conduct photosynthesis

• chloroplasts that conduct cellular respiration

• mitochondria that conduct cellular respiration

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Which process uses the products of photosynthesis as reactants?

• active transport

• cellular respiration

• DNA replication

• protein synthesis

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which of the following is an abiotic factor?

• human
• bird
• grass
• rock

Tags

NGSS.MS-LS2-3

What number indicates the nucleus?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-8