IB Biology SL Biological Molecules

Scientists have found geysers on one of Saturn’s moons. The geysers release water vapor containing complex organic compounds, which may indicate the presence of life. Which of the following elements is most likely abundant in the organic compounds in the water vapor?

• carbon

• chlorine

• iron

• zinc

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS1-6

NGSS.HS-LS2-5

Which of the following is the main reason that humans need to include carbohydrates in their diet?

• Carbohydrates are broken down in cells for energy.

• Carbohydrates combine to form many different proteins.

• Carbohydrates act as catalyst to speed up chemical reactions.

• Carbohydrates are the building blocks for cell growth and repair.

Tags

NGSS.HS-LS1-7

Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?

• Carbohydrate

• Lipid

• Nucleic Acid

• Protein

_________ are composed out of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P)

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Monosaccharides are monomers of

• Carbohydrates
• Lipids
• Proteins
• Nucleic Acids

Which macromolecule is shown?

• lipid

• protein

• nucleic acid

• carbohydrate

What suffix (word ending) is used in the names of most carbohydrates?

• -ase
• -nic
• -ose
• -yme

Building blocks of the body, hair , muscles etc.

• protein
• nucleic acid
• lipids
• carbohydrates

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

These biomolecules are, in order of appearance...

• cis and trans saturated fatty acids

• cis and trans unsaturated fatty acids

• trans and cis saturated fatty acids

• trans and cis unsaturated fatty acids

Tags

NGSS.HS-PS1-2

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .