Question

5 multiple choice 1 point which factor best explains why lipids are important components of waterproof coatings of organisms? lipid molecules are polar (likes water) and generally soluble in water lipid molecules are nonpolar (do not like water) and generally not soluble in water lipid molecules are polar (likes water) and generally not soluble in water 6 multiple choice 1 point the breakdown of complex carbohydrates into glucose is completed in the small intestine during digestion. what protein acts as a catalyst to speed up the reaction? enzyme cellulose hormone 7 multiple choice 1 point which statement about enzymes is true? enzymes are not affected by biotic factors in the environment. enzymes have an active site that binds to a variety of different substrates enzymes have an active site that has a complementary shape to a substrate. 8 multiple choice 1 point which statement describes the structure and function of an organic molecule that is found in all organisms? nucleic acids are long chains composed of nucleotides and contain the cells genetic code. proteins are composed of fatty acids and are important in the formation of muscles and steroids lipids are large molecules composed of long chains of amino acids and serve as sources of stored energy. 9 multiple choice 1 point why do people training for athletic events eat lots of carbohydrates in their diets? carbohydrates help transport fluids in the body carbohydrates can be converted to proteins and fats by the body carbohydrates act as an quick source of energy 10 multiple choice 1 point which phrase explains how an enzyme speeds up the rate of a chemical reaction? by increasing the concentration of the enzyme - substrate complex formed in the reaction by lowering the minimum amount of energy required to start the reaction by increasing the surface area of the substrate involved in the reaction 11 multiple choice 1 point lactose intolerance is the inability of the human body to digest lactose, a simple sugar found in milk and dairy products. lowering of which biomolecules function results in lactose intolerance? proteins that serve as enzymes carbohydrates that are important fibers proteins that act as hormones 12 multiple choice 1 point what is the primary function of the carbohydrate cellulose? to store energy in animal cells to provide structural support for plant cells to store energy in plant cells

Explanation:

Question 5:

Lipids are non - polar and not water - soluble, which makes them useful for waterproofing. So the correct statement is that lipid molecules are nonpolar (do not like water) and generally not soluble in water.

Question 6:

Enzymes are proteins that act as catalysts in biological reactions, such as the breakdown of complex carbohydrates in the small intestine.

Question 7:

Enzymes have an active site with a complementary shape to a specific substrate. This is a fundamental property of enzymes.

Question 8:

Nucleic acids are long chains of nucleotides and carry the genetic code, which is a characteristic feature of a molecule found in all organisms.

Question 9:

Carbohydrates are a quick source of energy, which is why athletes consume them.

Question 10:

Enzymes speed up reactions by lowering the activation energy required to start the reaction.

Question 11:

Lactose intolerance is due to a deficiency in lactase, an enzyme (a protein). So, proteins that serve as enzymes are affected.

Question 12:

The primary function of cellulose, a carbohydrate, is to provide structural support for plant cells.

Answer:

1. Lipid molecules are nonpolar (do not like water) and generally not soluble in water.
2. enzyme
3. Enzymes have an active site that has a complementary shape to a substrate.
4. Nucleic acids are long chains composed of nucleotides and contain the cells' genetic code.
5. Carbohydrates act as an quick source of energy
6. by lowering the minimum amount of energy required to start the reaction
7. proteins that serve as enzymes
8. to provide structural support for plant cells