BIO 111 Tamu Fletcher Final Exam Questions
And Answers
Element present in all organic molecules is - ANSWER Carbon
Cell membranes possess distinct inside and outside faces. Which of the following
statements is the most probable explanation for a cell membrane being asymmetrical? -
ANSWER The two sides of a cell membrane face different environments and perform
different functions
Which of the following is true of buffer solutions? - ANSWER They have a relatively
constant pH in both acid and base additions.
When are most atoms stable? - ANSWER when all of the valence shell electron orbitals
are filled
Which functional groups are common to all amino acids? - ANSWER carboxyl and amino
Nitrogen is more electronegative than hydrogen. Which of the following is a correct
statement about the atoms in ammonia NH3? - ANSWER Each hydrogen atom has a
partial positive charge; the nitrogen atom has a partial negative charge.
Which of the following is a major difference between RNA and DNA? - ANSWER type of
sugar
Saturated fats - ANSWER Solid at room temp; contain more hydrogen than unsaturated
fats that consist of the same number of carbon atoms
What part of amino acid structure differs between amino acids? - ANSWER the
, constituents of the R-group
The relationship between amino acid and polypeptide is analogous to the relationship
between ________. - ANSWER nucleotide and nucleic acid
Which of the following is an alkali? - ANSWER NaOH → Na+ + OH-
Which of the following statements about the sodium potassium pump is incorrect? -
ANSWER It is a type of symporter
For a protein to be an integral membrane protein it would need to be _____. - ANSWER
amphipathic, containing at least one hydrophobic region
Of the 98 natural elements, about 25 are known to be essential to life. Which 4 of these
25 elements comprise about 96% of living matter? - ANSWER carbon hydrogen nitrogen
oxygen
Which of the following statements correctly describes osmosis? - ANSWER In osmosis
water moves across a membrane from areas of lower solute concentration to areas of
higher solute concentration.
Which of the following are broken when water evaporates? - ANSWER hydrogen bonds
What types of molecules can most easily pass through a cell membrane? - ANSWER
small and hydrophobic
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the mRNA
synthesized following the template will be - ANSWER 3'-UAACGU-5'
Which of the following is false about alpha helices and beta pleated sheets? - ANSWER a
beta pleated sheet forms a covalent bond between atoms on the backbone of the
And Answers
Element present in all organic molecules is - ANSWER Carbon
Cell membranes possess distinct inside and outside faces. Which of the following
statements is the most probable explanation for a cell membrane being asymmetrical? -
ANSWER The two sides of a cell membrane face different environments and perform
different functions
Which of the following is true of buffer solutions? - ANSWER They have a relatively
constant pH in both acid and base additions.
When are most atoms stable? - ANSWER when all of the valence shell electron orbitals
are filled
Which functional groups are common to all amino acids? - ANSWER carboxyl and amino
Nitrogen is more electronegative than hydrogen. Which of the following is a correct
statement about the atoms in ammonia NH3? - ANSWER Each hydrogen atom has a
partial positive charge; the nitrogen atom has a partial negative charge.
Which of the following is a major difference between RNA and DNA? - ANSWER type of
sugar
Saturated fats - ANSWER Solid at room temp; contain more hydrogen than unsaturated
fats that consist of the same number of carbon atoms
What part of amino acid structure differs between amino acids? - ANSWER the
, constituents of the R-group
The relationship between amino acid and polypeptide is analogous to the relationship
between ________. - ANSWER nucleotide and nucleic acid
Which of the following is an alkali? - ANSWER NaOH → Na+ + OH-
Which of the following statements about the sodium potassium pump is incorrect? -
ANSWER It is a type of symporter
For a protein to be an integral membrane protein it would need to be _____. - ANSWER
amphipathic, containing at least one hydrophobic region
Of the 98 natural elements, about 25 are known to be essential to life. Which 4 of these
25 elements comprise about 96% of living matter? - ANSWER carbon hydrogen nitrogen
oxygen
Which of the following statements correctly describes osmosis? - ANSWER In osmosis
water moves across a membrane from areas of lower solute concentration to areas of
higher solute concentration.
Which of the following are broken when water evaporates? - ANSWER hydrogen bonds
What types of molecules can most easily pass through a cell membrane? - ANSWER
small and hydrophobic
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the mRNA
synthesized following the template will be - ANSWER 3'-UAACGU-5'
Which of the following is false about alpha helices and beta pleated sheets? - ANSWER a
beta pleated sheet forms a covalent bond between atoms on the backbone of the
