Molecules of Life

​Molecules of

Life

​What your body made of?

​•The human body is mostly water

–Lean muscle: 75% water

–Blood: 83% water

–Body fat: 25% water

–Bone: 22% water

Water​

​

​•Water is a polar molecule

– Each atom has a partial charge

–Molecule has zero net charge

​Properties of Water

​

​Molecules of LIfe

​Special Properties of Water

•Polar molecules have special properties

–Good solvents

–Bond with each other (cohesion)

–Take longer to heat and cool

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•Water molecules are attracted to molecules of solid surfaces (adhesion)

•Adhesion allows water to move through very small pores or tubes against gravity (capillary action)

​Some text here about the topic of discussion.

​Learning Check-up

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Multiple Choice

How many percent is water in our lean muscle?

• 78%

• 75%

• 83%

• 25%

Multiple Choice

What is the net charge of water molecule?

• 100

• -1

• +2

• 0

Fill in the Blank

Water can bond to each other. What do you call this property?

Multiple Choice

Water molecules are attracted to molecules of solid surfaces. What do you call this property?

• Surface tension

• adhesion

• cohesion

• capillary action

​Macromolecules

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​Main source of energy in our body.

​​Carbohydrates

​

​Stores energy and make up biological membranes and waterproof coverings.

​​Lipids

​

​Stores and transmit genetic information

​​Nucleic acid

​

​Control rate of chemical reactions through enzymes. Makes up bones and muscles.

​Protein

​

Learning Check-up​

Multiple Choice

Which of the following is considered the main source of energy?

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

Multiple Choice

Which of the following macromolecules has carbon, hydrogen, oxygen and nitrogen in its formula?

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

Fill in the Blank

What is the monomer of nucleic acid?

Match

Match the following

• Carbohydrates

• Proteins

• Lipids

• Nucleic acid

monosaccharides

amino acids

fatty acid and glycerol

nucleotides

• monosaccharides

• amino acids

• fatty acid and glycerol

• nucleotides

Multiple Choice

DNA and RNA are good examples of what macromolecule?

• Proteins

• Lipids

• Nucleic acid

• Carbohydrates

Match

Match the following

• Glucose, Fructose, Starch

• Beans and peanuts

• Fats, Oils, Waxes

• DNA, RNA

Carbohydrates

Proteins

Lipids

Nucleic acids

• Carbohydrates

• Proteins

• Lipids

• Nucleic acids

Fill in the Blank

What macromolecule that has a formula of C₆H₁₂O₆?

Open Ended

In 5 sentences, write a summary of the lesson molecules of life.

Awesome!​