Unit 1: Biochemistry

A student conducted an experiment to determine if the amount of water added to a plant affected its growth. Amount of water added was measured in mL per day and plant growth was measured in cm. What is the independent variable?

• Water added

• Amount of sun

• Type of plant

• Plant growth in cm

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A student conducted an experiment to determine if the amount of water added to a plant affected its growth. Amount of water added was measured in mL per day and plant growth was measured in cm. What is the dependent variable?

• Water added

• Amount of sun

• Type of plant

• Plant growth in cm

Tags

NGSS.MS-LS2-1

Which of the following characteristics of living things best explains why birds fly south for the winter?

• 1. Living things respond to their environment

• 1. Living things are made up of cells

• 1. Livings things have DNA

• 1. Living things maintain homeostasis

Tags

NGSS.MS-LS2-1

Living and non-living things can display characteristics of life. Both a fast-moving stream and a dog have some characteristics of life, but what characteristic of life is why a dog is considered alive and a stream isn’t?

• The ability to grow and develop

• 1. Being able to change over time

• 1. The ability to move

• 1. Being made of cells

Tags

NGSS.MS-LS1-1

The mouth, stomach, and intestines work together to do a specific job. This is an example of?

• Organ

• Organ System

• Cell

• Tissue

Tags

NGSS.MS-LS1-3

A covalent bond gets its name from the fact that two atoms share (co-) outer electron rings (valent). Based on this image, why is the bond NOT a covalent bond?

• 1. The two atoms are attracted electrically, making it a hydrogen bond

• 1. The lithium and fluorine are not sharing the electron - it is an ionic bond

• 1. Lithium is an alkali metal, thus it would be a metallic bond

• 1. Fluorine atoms cannot form covalent bonds

Using the pH scale, what is the best explanation as to why a substance has a pH of 9.5?

• This substance is an acid

• This substance has excess hydroxide (OH-) ions

• 1. This substance is considered as pure water

• 1. This substance has excess hydrogen (H+) ions

Which of the following chemical compounds represents an organic molecule?

• LiFl

• CuSO4H2O

• CH4

• H2O

Tags

NGSS.HS-LS1-6

Examine the list below and identify the correct pairing of a macromolecule and its function?

• 1. Nucleic Acid - stores genetic information

• 1. Lipid - enzymes

• 1. Protein - primary source of energy for the body

• 1. Carbohydrate - used for building muscle

Tags

NGSS.MS-LS3-1

Josh is a sprint runner. Before the race, Josh eats Gatorade chews and a candy bar that contains carbs, proteins, and lipids. He also makes sure to drink plenty of water. Which of the following would most likely be Josh’s source of stored energy so Josh can finish the whole race?

• 1. Lipid

• 1. Water

• 1. Carbohydrate

• 1. Protein