IB Biology 2.1 - 2.3

A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages. Which molecule fits this description?

• glycogen

• cellulose

• amylose

• amylopectin

What type of molecule is shown in this diagram?

• trans saturated fatty acid

• cis unsaturated fatty acid

• cis saturated fatty acid

• trans unsaturated fatty acid

Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in the small intestine. Which characteristics of glucose prevent its diffusion through the phospholipid bilayer?

• it is non-polar and therefore hydrophobic

• its hydrogen bonds link with amino acids in the protein channel

• it is polar and therefore hydrophilic

• its covalent bonds interact with the phospholipids

What characteristic shows that this steroid molecule is a lipid?

• it is made of carbon rings

• it has a very low proportion of oxygen to carbon

• it contains OH groups as do fatty acids

• it is made only of nitrogen, oxygen, and hydrogen

The diagram shows the structure of palmitic acid. What type of fatty acid is palmitic acid?

• it is monosaturated

• it is polyunsaturated

• it is saturated

• it is a trans-fatty acid

Tags

NGSS.HS-PS1-2

What is a role of cholesterol in animal cells?

• it increases body fat

• it controls membrane fluidity

• it lines the inner wall of capillaries

• it is a constituent of bile

Which molecule diagram corresponds to the name?

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

Which molecule is a sugar?

• 
• 
• 
• 

What molecule is a polysaccharide?

• glucagon

• glycose

• glycerol

• glycogen

Which substance is used for structure in plants?

• amylopectin

• cellulose

• collagen

• starch