Human Bio Final Exam QUESSTIONS
AND ANSWERS
Where do living things get their energy & matter from? - ANSWER>>sunlight &
environment
How many kingdoms are used to organize our biological world? - ANSWER>>5
kingdoms
includes:
- animalia
- protista
- plantae
- fungi
Which of the following is NOT a defining feature for humans? -
ANSWER>>includes: how have we survived so long?
- Bipedalism
- Opposable thumbs
- Large brain
- Capacity for complex language
What is the correct way to define how our bodies are organized? - ANSWER>>-
Atoms & molecules are natural elements
- Cell: smallest unit of life
- Tissues: group of similar cells
- Organs: tissues with same function
- Organ system: carry out general function
•Organism: you!
Which statement is correct?
,A. protons have positive charge and reside in the nucleus
B. electrons have a negative charge and revolve around the nucleus in orbitals
C. neutrons have no charge & reside in the nucleus
D. isotopes have similar properties but vary in # of neutrons
E. all of the above - ANSWER>>E. all of the above
The type of bonding where electrons are shared between two atoms is called
____. - ANSWER>>covalent
A O = O depicts: - ANSWER>>double covalent bond
Bonds are termed single, double and triple share ___ respectively. -
ANSWER>>electrons
True or False: Evaporation of water gives up heat energy - ANSWER>>true
True or False: Water is the ideal solvent in living organisms because it is a polar
liquid at body temperature. - ANSWER>>true
An acid is ____ - ANSWER>>pH value is lower than 7 in an aqueous solution
- acts proton donor
- have releasable H ion
In order to minimize drastic changes in pH, which essential for homeostasis, our
bodies have buffers which have ___. - ANSWER>>- a weak acid or base together
with one of its salts.
- carbonic acid: add H ion; lower pH
- bicarbonate ions: remove H ion; increase pH
Our first cell came from ____. - ANSWER>>- fertilized egg (preexisting cells)
, Which macromolecule is made up of sugars called monosaccharides? -
ANSWER>>carbohydrates
Which organic molecule is insoluble in water & essential in membrane formation?
- ANSWER>>lipids
Nucleic Acids are made of - ANSWER>>nucleotides
The difference between DNA & RNA is ___ - ANSWER>>DNA is double stranded
sugar phosphate while
- double strand of nucleotides organized into a helix
RNA is single stranded sugar phosphate
Amino Acids are building blocks coding for - ANSWER>>proteins
Which of the following protein structures includes alpha helices and folded beta
sheets? - ANSWER>>secondary structure
True or False: Proteins can have 4 structures, and are found to be essential for
energy, communication, and transport. - ANSWER>>true
Cells that are typically bacterial cells and don't have a true nucleus are called ___.
- ANSWER>>prokaryotes
Why are cells so small? - ANSWER>>- they need larger surface area to volume
ratios
- Total metabolic activities of a cell are proportional to its volume of cytoplasm. -
Larger cells, less cytoplasmic space for organelles... too crowded
True or False: The total metabolic activities of all cell proportional to its volume of
cytoplasm (size). - ANSWER>>true
AND ANSWERS
Where do living things get their energy & matter from? - ANSWER>>sunlight &
environment
How many kingdoms are used to organize our biological world? - ANSWER>>5
kingdoms
includes:
- animalia
- protista
- plantae
- fungi
Which of the following is NOT a defining feature for humans? -
ANSWER>>includes: how have we survived so long?
- Bipedalism
- Opposable thumbs
- Large brain
- Capacity for complex language
What is the correct way to define how our bodies are organized? - ANSWER>>-
Atoms & molecules are natural elements
- Cell: smallest unit of life
- Tissues: group of similar cells
- Organs: tissues with same function
- Organ system: carry out general function
•Organism: you!
Which statement is correct?
,A. protons have positive charge and reside in the nucleus
B. electrons have a negative charge and revolve around the nucleus in orbitals
C. neutrons have no charge & reside in the nucleus
D. isotopes have similar properties but vary in # of neutrons
E. all of the above - ANSWER>>E. all of the above
The type of bonding where electrons are shared between two atoms is called
____. - ANSWER>>covalent
A O = O depicts: - ANSWER>>double covalent bond
Bonds are termed single, double and triple share ___ respectively. -
ANSWER>>electrons
True or False: Evaporation of water gives up heat energy - ANSWER>>true
True or False: Water is the ideal solvent in living organisms because it is a polar
liquid at body temperature. - ANSWER>>true
An acid is ____ - ANSWER>>pH value is lower than 7 in an aqueous solution
- acts proton donor
- have releasable H ion
In order to minimize drastic changes in pH, which essential for homeostasis, our
bodies have buffers which have ___. - ANSWER>>- a weak acid or base together
with one of its salts.
- carbonic acid: add H ion; lower pH
- bicarbonate ions: remove H ion; increase pH
Our first cell came from ____. - ANSWER>>- fertilized egg (preexisting cells)
, Which macromolecule is made up of sugars called monosaccharides? -
ANSWER>>carbohydrates
Which organic molecule is insoluble in water & essential in membrane formation?
- ANSWER>>lipids
Nucleic Acids are made of - ANSWER>>nucleotides
The difference between DNA & RNA is ___ - ANSWER>>DNA is double stranded
sugar phosphate while
- double strand of nucleotides organized into a helix
RNA is single stranded sugar phosphate
Amino Acids are building blocks coding for - ANSWER>>proteins
Which of the following protein structures includes alpha helices and folded beta
sheets? - ANSWER>>secondary structure
True or False: Proteins can have 4 structures, and are found to be essential for
energy, communication, and transport. - ANSWER>>true
Cells that are typically bacterial cells and don't have a true nucleus are called ___.
- ANSWER>>prokaryotes
Why are cells so small? - ANSWER>>- they need larger surface area to volume
ratios
- Total metabolic activities of a cell are proportional to its volume of cytoplasm. -
Larger cells, less cytoplasmic space for organelles... too crowded
True or False: The total metabolic activities of all cell proportional to its volume of
cytoplasm (size). - ANSWER>>true
