BCH 3025 Exam 1 Extra Questions And Answers With
Verified Updates
Which is a list of organelles?
A) Mitochondria, chromatin, endoplasmic reticulum
B) Peroxisomes, lysosomes, plasma membrane
C) Proteasomes, peroxisomes, lysosomes
D) Mitochondria, endoplasmic reticulum, peroxisomes
E) All of the above ANS Mitochondria, endoplasmic reticulium, peroxisomes
The catalog of all proteins functioning in a cell is the:
A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome. ANS proteome
Use the terms a) chemoautotrophs, b) chemoheterotrophs, c) photoautotrophs, and d) photoheterotrophs and
identify the answer that correctly finishes the statement:
Carnivores are and herbivores are ANS B, B
Both chemoheterotrophs
When two genes in an organism share detectable sequence similarity, those genes or their gene products, are
said to be:
A) homologues.
B) orthologues.
C) paralogues.
D) A and B.
E) A and C ANS A) Homologues
C) Paralogues
Both A and C
, Which two amino acids differ from each other by only one atom?
A) Ser and Thr
B) Leu and Ile
C) Ala and Ser
D) Asp and Asn
E) Ser and Cys ANS Ser and Cys
At pH 7.0, converting a proline to hydroxyproline, will have what effect on the overall charge of the protein
containing it?
A)It will become more negative
B)It will become more positive.
C)It will stay the same.
D)There is not enough information to answer the question. E)The answer depends on the salt concentration.
ANS It will stay the same
A nonapeptide was determined to have the following amino acid com
position: (Lys)2, (Gly) 2, (Phe) 2, His, Leu, Met. The native peptide was incubated with 1-fluoro-2,4-
dinitrobenzene (FDNB) and then hydrolyzed; 2,4-dinitrophenylhistidine was identified by HPLC. When the
native peptide was exposed to cyanogen bromide(CNBr), an octapeptide and free glycine were recovered.
Incubation of the native peptide with trypsin gave a pentapeptide, a tripeptide, and free Lys. 2,4-Dinitrophenyl-
histidine was recovered from the pentapeptide, and 2,4-dinitrophenylphenylalanine was recovered
from the tripeptide. Digestion with the enzyme pepsin produced a dipeptide, a tripeptide, and a tetrapeptide.
The tetrapeptide was composed of (Lys) 2, Phe, and Gly. The native sequence was determined to be ANS
His-Leu-Phe-Gly-Lys-Lys-Phe-Met-Gly
Identify the pair of peptides below that cannot be distinguished by tandem mass spectrometry.
A)VTSPLYANEGK and VTCPLYANEGK
B) VTSPLYANEGK and VTSPLYADEGK
C) VTSPLYANEGK and VTSPIYANEGK
D) VTSPLYANEGK and VSTPLYANEGK
E) All of the above ANS VTSPLYANEGK and VTSPIYANEGK
Verified Updates
Which is a list of organelles?
A) Mitochondria, chromatin, endoplasmic reticulum
B) Peroxisomes, lysosomes, plasma membrane
C) Proteasomes, peroxisomes, lysosomes
D) Mitochondria, endoplasmic reticulum, peroxisomes
E) All of the above ANS Mitochondria, endoplasmic reticulium, peroxisomes
The catalog of all proteins functioning in a cell is the:
A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome. ANS proteome
Use the terms a) chemoautotrophs, b) chemoheterotrophs, c) photoautotrophs, and d) photoheterotrophs and
identify the answer that correctly finishes the statement:
Carnivores are and herbivores are ANS B, B
Both chemoheterotrophs
When two genes in an organism share detectable sequence similarity, those genes or their gene products, are
said to be:
A) homologues.
B) orthologues.
C) paralogues.
D) A and B.
E) A and C ANS A) Homologues
C) Paralogues
Both A and C
, Which two amino acids differ from each other by only one atom?
A) Ser and Thr
B) Leu and Ile
C) Ala and Ser
D) Asp and Asn
E) Ser and Cys ANS Ser and Cys
At pH 7.0, converting a proline to hydroxyproline, will have what effect on the overall charge of the protein
containing it?
A)It will become more negative
B)It will become more positive.
C)It will stay the same.
D)There is not enough information to answer the question. E)The answer depends on the salt concentration.
ANS It will stay the same
A nonapeptide was determined to have the following amino acid com
position: (Lys)2, (Gly) 2, (Phe) 2, His, Leu, Met. The native peptide was incubated with 1-fluoro-2,4-
dinitrobenzene (FDNB) and then hydrolyzed; 2,4-dinitrophenylhistidine was identified by HPLC. When the
native peptide was exposed to cyanogen bromide(CNBr), an octapeptide and free glycine were recovered.
Incubation of the native peptide with trypsin gave a pentapeptide, a tripeptide, and free Lys. 2,4-Dinitrophenyl-
histidine was recovered from the pentapeptide, and 2,4-dinitrophenylphenylalanine was recovered
from the tripeptide. Digestion with the enzyme pepsin produced a dipeptide, a tripeptide, and a tetrapeptide.
The tetrapeptide was composed of (Lys) 2, Phe, and Gly. The native sequence was determined to be ANS
His-Leu-Phe-Gly-Lys-Lys-Phe-Met-Gly
Identify the pair of peptides below that cannot be distinguished by tandem mass spectrometry.
A)VTSPLYANEGK and VTCPLYANEGK
B) VTSPLYANEGK and VTSPLYADEGK
C) VTSPLYANEGK and VTSPIYANEGK
D) VTSPLYANEGK and VSTPLYANEGK
E) All of the above ANS VTSPLYANEGK and VTSPIYANEGK
