BSC 1005 - EXAM 1 (CHAPTER 1-3)
Name four macromolecules. - ANSWERS-*Carbohydrates
*Proteins
*Lipids
*Nucleic acids
List the major dietary micro nutrients and describe their functions. -
ANSWERS-*Micronutrients are dietary substances required in
minute amounts for proper growth and development ; they include
vitamins & minerals
*Vitamins are organic substances, most of which the body cannot
synthesize. Many vitamins severe as coenzymes to help enzymes
function properly.
*Minerals are inorganic substances essential for many cell functions.
Describe the processes of endocytosis and exocytosis. - ANSWERS-
*Larger molecules move into (endocytosis) and out (exocytosis.) of
cells enclosed in membrane bound vesicles.
Metabolism - ANSWERS-Includes all chemical processed that occur
in cells
, Describe how atomic structure affects chemical bonding. -
ANSWERS-Chemical bonding depends on an element's electron
configuration. Electrons closer to the nucleus have less energy than
those farther away.
Chemical Bonds - ANSWERS-Chemical bonds can be formed by the
atoms that have space in their valence shell
Elements - ANSWERS-Fundamental forms of matter that are
composed of atoms that cannot be broken down by normal physical
means
Atoms - ANSWERS-Smallest unit that has properties of any given
element
How many natural elemental atoms have been described by chemists?
- ANSWERS-92
Protons - ANSWERS-Positive charge. These particles & the charged
neutrons create the nucleus.
Neutral atom - ANSWERS-It has equal protons & electons
Ion - ANSWERS-It does NOT have equal protons & electrons
Name four macromolecules. - ANSWERS-*Carbohydrates
*Proteins
*Lipids
*Nucleic acids
List the major dietary micro nutrients and describe their functions. -
ANSWERS-*Micronutrients are dietary substances required in
minute amounts for proper growth and development ; they include
vitamins & minerals
*Vitamins are organic substances, most of which the body cannot
synthesize. Many vitamins severe as coenzymes to help enzymes
function properly.
*Minerals are inorganic substances essential for many cell functions.
Describe the processes of endocytosis and exocytosis. - ANSWERS-
*Larger molecules move into (endocytosis) and out (exocytosis.) of
cells enclosed in membrane bound vesicles.
Metabolism - ANSWERS-Includes all chemical processed that occur
in cells
, Describe how atomic structure affects chemical bonding. -
ANSWERS-Chemical bonding depends on an element's electron
configuration. Electrons closer to the nucleus have less energy than
those farther away.
Chemical Bonds - ANSWERS-Chemical bonds can be formed by the
atoms that have space in their valence shell
Elements - ANSWERS-Fundamental forms of matter that are
composed of atoms that cannot be broken down by normal physical
means
Atoms - ANSWERS-Smallest unit that has properties of any given
element
How many natural elemental atoms have been described by chemists?
- ANSWERS-92
Protons - ANSWERS-Positive charge. These particles & the charged
neutrons create the nucleus.
Neutral atom - ANSWERS-It has equal protons & electons
Ion - ANSWERS-It does NOT have equal protons & electrons
