BIOLOGY 121 EXAM QUESTIONS AND
ANSWERS ALL CORRECT
Which of the following pairs has the most similar chemical properties?
1H and 22Na
12C and 28Si
16O and 32S
12C and 14C
1H and 2He - Answer- 12C and 14C
How does a cell rid itself of defective or malfunctioning organelles?
The organelles are engulfed by plastids and stored.
Defective organelles accumulate until the cell itself dies.
Lysosomes assist in the removal of defective organelles by digesting them.
Ribosomes remove malfunctioning organelles by degrading the parts.
The organelles are exported by phagocytosis. - Answer- Lysosomes assist in the
removal of defective organelles by digesting them.
What cellular organelle is responsible for receiving the mRNA and turning it into a
protein?
Golgi body
ribosome
nucleus
lysosome - Answer- ribosome
The organization of organisms includes these following levels, (1) organism, (2) cell, (3)
molecules, (4) tissues, (5) organ. Which order is correct?
,"3,4,5,2,1"
"3,2,5,4,1."
"2,3,4,5,1."
"3,2,4,5,1." - Answer- "3,2,4,5,1."
In the Testing the buffering effects of various biological solutions, why do we use
distilled water for testing materials initially?
Distilled water is clean so that we could see changes in colors
Distilled water contains no other substances so that it serves as a good baseline
Distilled water is essential to all life forms so we need to know how it works
Acids and bases only work in distilled water - Answer- Distilled water contains no other
substances so that it serves as a good baseline
Which of the following properties of water enable(s) it to function as a moderator of
temperature for living organisms?
High specific heat
Low specific heat
High heat of vaporization
High specific heat and high heat of vaporization
High specific heat and low heat of vaporization - Answer- High specific heat and high
heat of vaporization
Prions are known to cause
mad cow disease.
the common cold.
herpes.
sickle cell anemia.
hemophilia - Answer- mad cow disease
,Each time the water in a cell freezes slowly, long sharp crystals spear through the
membrane
structures of the cell. However, in the frozen state, virtually no chemical reactions occur.
The most
likely explanation for the bad taste of meat that has ""freezer burn"" from repeated
freezing is the
destruction of
the Golgi bodies and their vesicles.
lysosomes and resultant autodigestion.
rough endoplasmic reticulum causing the release of ribosomes.
ribosomes causing them to break into subunits.
the nuclear membrane causing mixing of nucleoplasm and cytoplasm. - Answer-
lysosomes and resultant autodigestion
Which is a true statement about ribosomes?
Ribosomes contain DNA and protein.
Ribosomes are active in carbohydrate synthesis.
Ribosomal subunits leave the nucleus after being formed by the nucleolus.
Polyribosomes are the subunits of ribosomes.
Ribosomes are only found associated with the endoplasmic reticulum in prokaryotic
cells. - Answer- Ribosomal subunits leave the nucleus after being formed by the
nucleolus.
If an element contains 8 electrons how many electrons will be placed in the 2nd valence
shell?
6
2
8
5
11 - Answer- 6
, Which of the following is an example of natural selection?
Population of moths with dark speckles boomed as industrial sooth production
increased over 20 years.
Muscle mass of Canadian geese increases as they migrate south for winter.
Ivory trade caused a sharp decline in the African elephant population.
Dogs with longer legs are able to run faster than dos with shorter legs. - Answer-
Population of moths with dark speckles boomed as industrial sooth production
increased over 20 years.
The bond between two amino acids is ______.
formed by hydrolysis
an ionic bond
nonpolar
known as a peptide bond - Answer- peptide bond
Free radicals are considered dangerous because they
attack the atomic nucleus.
emit dangerous radiation.
"steal electrons from other atoms, causing them to become free radicals."
damage oxygen and cause it to become an antioxidant. - Answer- steal electrons from
other atoms, causing them to become free radicals.
All of the following are important to the theory of evolution EXCEPT:
environmental change.
variation in traits within a population.
mutations.
ANSWERS ALL CORRECT
Which of the following pairs has the most similar chemical properties?
1H and 22Na
12C and 28Si
16O and 32S
12C and 14C
1H and 2He - Answer- 12C and 14C
How does a cell rid itself of defective or malfunctioning organelles?
The organelles are engulfed by plastids and stored.
Defective organelles accumulate until the cell itself dies.
Lysosomes assist in the removal of defective organelles by digesting them.
Ribosomes remove malfunctioning organelles by degrading the parts.
The organelles are exported by phagocytosis. - Answer- Lysosomes assist in the
removal of defective organelles by digesting them.
What cellular organelle is responsible for receiving the mRNA and turning it into a
protein?
Golgi body
ribosome
nucleus
lysosome - Answer- ribosome
The organization of organisms includes these following levels, (1) organism, (2) cell, (3)
molecules, (4) tissues, (5) organ. Which order is correct?
,"3,4,5,2,1"
"3,2,5,4,1."
"2,3,4,5,1."
"3,2,4,5,1." - Answer- "3,2,4,5,1."
In the Testing the buffering effects of various biological solutions, why do we use
distilled water for testing materials initially?
Distilled water is clean so that we could see changes in colors
Distilled water contains no other substances so that it serves as a good baseline
Distilled water is essential to all life forms so we need to know how it works
Acids and bases only work in distilled water - Answer- Distilled water contains no other
substances so that it serves as a good baseline
Which of the following properties of water enable(s) it to function as a moderator of
temperature for living organisms?
High specific heat
Low specific heat
High heat of vaporization
High specific heat and high heat of vaporization
High specific heat and low heat of vaporization - Answer- High specific heat and high
heat of vaporization
Prions are known to cause
mad cow disease.
the common cold.
herpes.
sickle cell anemia.
hemophilia - Answer- mad cow disease
,Each time the water in a cell freezes slowly, long sharp crystals spear through the
membrane
structures of the cell. However, in the frozen state, virtually no chemical reactions occur.
The most
likely explanation for the bad taste of meat that has ""freezer burn"" from repeated
freezing is the
destruction of
the Golgi bodies and their vesicles.
lysosomes and resultant autodigestion.
rough endoplasmic reticulum causing the release of ribosomes.
ribosomes causing them to break into subunits.
the nuclear membrane causing mixing of nucleoplasm and cytoplasm. - Answer-
lysosomes and resultant autodigestion
Which is a true statement about ribosomes?
Ribosomes contain DNA and protein.
Ribosomes are active in carbohydrate synthesis.
Ribosomal subunits leave the nucleus after being formed by the nucleolus.
Polyribosomes are the subunits of ribosomes.
Ribosomes are only found associated with the endoplasmic reticulum in prokaryotic
cells. - Answer- Ribosomal subunits leave the nucleus after being formed by the
nucleolus.
If an element contains 8 electrons how many electrons will be placed in the 2nd valence
shell?
6
2
8
5
11 - Answer- 6
, Which of the following is an example of natural selection?
Population of moths with dark speckles boomed as industrial sooth production
increased over 20 years.
Muscle mass of Canadian geese increases as they migrate south for winter.
Ivory trade caused a sharp decline in the African elephant population.
Dogs with longer legs are able to run faster than dos with shorter legs. - Answer-
Population of moths with dark speckles boomed as industrial sooth production
increased over 20 years.
The bond between two amino acids is ______.
formed by hydrolysis
an ionic bond
nonpolar
known as a peptide bond - Answer- peptide bond
Free radicals are considered dangerous because they
attack the atomic nucleus.
emit dangerous radiation.
"steal electrons from other atoms, causing them to become free radicals."
damage oxygen and cause it to become an antioxidant. - Answer- steal electrons from
other atoms, causing them to become free radicals.
All of the following are important to the theory of evolution EXCEPT:
environmental change.
variation in traits within a population.
mutations.
