Biology Chapter 2 Review

Starch does not?

Starch tastes sweet because it is made from glucose.

Which of the following phenomena is most likely due to high cohesiveness of water?

The fishing spider can walk across the surface of liquid water

water can absorb and store a large amount of heat while increasing only a few degrees in temperatures. Why?

The heat must first be used to break the hydrogen bonds rather than raise the temperature.

Which of the following nucleotide bases are present in equal amounts in DNA?

adenine and thymine

Dietary Proteins:

are considered complete only if they contain all of the amino acids required by humans

In an unsaturated fatty acid:

carbon-carbon double bonds are present in the hydrocarbon chain

Sucrose (table sugar) and lactose are examples of?

disaccharides

Enzymes do not...?

do not undergo a permanent change during the reactions the promote

Proteins most common purpose is?

raw material for growth

phospholipids are not used for?

short term energy

Fiber does not...?

slow the passage of food through the intestines

quaternary structure is best described as?

threads in a cloth

A covalent bond is formed when?

two atoms share electrons

The atomic number of carbon is 6. Its nucleus must contain?

6 Protons and 6 Neutrons

The second orbital shell of an atom can hold how many electrons?

8 electrons

A chemical compound that releases H+ into a solution is called?

An acid

Which type of macromolecules conatins an organisms genetic info?

DNA

Which of the following foods is not a significant source of complex carbohydrates?

Fresh fruit