LS Bio 1.1

How is a DNA molecule arranged?

• double-stranded with alternating deoxyribose and phosphate groups on the sides with adenine, guanine, cytosine, and thymine in the middle

• double-stranded with alternating deoxyribose and phosphate groups on the sides with adenine, guanine, cytosine, and uracil in the middle

• double-stranded with alternating ribose and phosphate groups on the sides with adenine, guanine, cytosine, and thymine in the middle

• double-stranded with alternating ribose and phosphate groups on the sides with adenine, guanine, cytosine, and uracil in the middle

Which table shows the correct pairing of each organic molecule with its function?

• 
• 
• 
• 

Scientists examine the structure of an organic molecule and identify phosphate groups, sugar molecules, and nitrogenous bases. Which molecule were they examining?

• • carbohydrate

• • lipid

• • nucleic acid

• • protein

What relationship exists between amino acids and proteins?

• • Proteins and amino acids bond to form lipids.

• • Amino acids are larger molecules than proteins.

• • Proteins are made up of amino acids.

• • Amino acids form when proteins bond together.

Which statement is true about nucleic acids?

• • They are found only in the nucleus of cells.

• • They serve as the subunits of proteins.

• • They are composed of sugar, glycerol, and nitrogen bases.

• • They store and transmit genetic information.

Tags

NGSS.HS-LS3-1

What happens when an organism has more carbohydrates than needed to meet its energy requirements?

• • The organism begins to break down fats.

• • The organism begins to break down proteins.

• • The extra energy is converted to protein and stored.

• • The extra energy is converted to fat and stored until needed.

What causes a duck's feathers to repel water?

• • A type of protein called an enzyme is secreted which forms a coating on the feathers.

• • A type of lipid called an enzyme is secreted which forms a coating on the feathers.

• • A type of protein called an oil is secreted which forms a coating on the feathers.

• • A type of lipid called an oil is secreted which forms a coating on the feathers.

Use the Venn diagram to compare and contrast two macromolecules.

What is the best title for the letter Q?

• • Carbohydrates

• • Lipids

• • Nucleic Acids

• • Proteins

Which factor best explains why lipids are important components of waterproof coatings of organisms?

• • Lipid molecules are polar and generally soluble in water.

• • Lipid molecules are polar and generally not soluble in water.

• • Lipid molecules are non-polar and generally not soluble in water.

• • Lipid molecules are non-polar and generally soluble in water

What would be the first and most direct impact to a cell if its production of nucleic acids was interrupted?

• • It would reduce the cell membrane's ability to control what enters and leaves the cell.

• • It would interfere with the cell's ability to transmit hereditary information to new cells.

• • It would reduce the amount of energy the cell would have available for life processes.

• • It would interfere with the production of lipids that regulate hormones and vitamins in the cell.