If one is testing a goodness of fit to a 9:3:3:1 ratio, how many degrees of freedom would be associated with the Chi-square?
1
2
3
4
not enough information to determine
Which of the following choices does not describe a type of posttranslational modification of proteins?
The amino terminal methionine may be removed.
Glycoproteins are produced by the attachment of phosphates to newly synthesized proteins.
Precursor proteins are cleaved and trimmed by protease enzymes to produce a functional protein.
Molecular chaperones help proteins fold correctly.
Amino acids in the amino terminal of the protein can be acetylated.
A eukaryotic DNA sequence that affects transcription at distant promoters is called a(n)
long distance promotor
regulator
operon
enhancer
DNA methylation may be a significant mode of genetic regulation in eukaryotes. Meythylation refers to
altering RNA polymerase activity by adding methyl-groups
changes in DNA-DNA hydrogen bonding
altering translation activity via methylated tRNAs
adding methyl groups to certain cytosines in DNA
If a nucleotide lacks a 3â-OH group, what will happen?
itâs transformed into RNA
another nucleotide can bond at the 3â site during replication
replication will halt
no effect
Which of the following describe posttranscriptional modifications commonly seen in mRNA of eukaryotes?
5â capping, 3â-poly-A tail addition, splicing
3â capping, 5â poly-A tail addition, splicing
heteroduplex formation
5â capping, 3âpolyA tail addition, removal of exons
In birds, females are the heterogametic sex. This means that
females have chromosomes in pairs.
emales produce eggs.
females determine the gender of their offspring.
males have two identical sex chromosomes (ZZ)
An anticodon on a tRNA has the sequence 5'âGCAâ3'. What would be the effect on translation if the G in the anticodon were mutated to a U?
The anticodon could pair to the serine codon 5'âUCAâ3', and a cysteine would be incorporated at all points where a serine should have been incorporated.
The anticodon could pair to the threonine codon 5'âACUâ3', and a threonine would be incorporated at all points where a cysteine should have been incorporated.
The anticodon could pair to the serine codon 5'âAGUâ3', and a serine would be incorporated at all points where a cysteine should have been incorporated.
The anticodon could pair to the stop codon 5'âUGAâ3', and instead of stopping translation, a cysteine would be incorporated and translation could continue.
If one is testing a goodness of fit to a 9:3:3:1 ratio, how many degrees of freedom would be associated with the Chi-square?
1
2
3
4
not enough information to determine
Which of the following choices does not describe a type of posttranslational modification of proteins?
The amino terminal methionine may be removed. |
Glycoproteins are produced by the attachment of phosphates to newly synthesized proteins. |
Precursor proteins are cleaved and trimmed by protease enzymes to produce a functional protein. |
Molecular chaperones help proteins fold correctly. |
Amino acids in the amino terminal of the protein can be acetylated. |
A eukaryotic DNA sequence that affects transcription at distant promoters is called a(n)
long distance promotor |
regulator |
operon |
enhancer |
DNA methylation may be a significant mode of genetic regulation in eukaryotes. Meythylation refers to
altering RNA polymerase activity by adding methyl-groups |
changes in DNA-DNA hydrogen bonding |
altering translation activity via methylated tRNAs |
adding methyl groups to certain cytosines in DNA |
If a nucleotide lacks a 3â-OH group, what will happen?
itâs transformed into RNA |
another nucleotide can bond at the 3â site during replication |
replication will halt |
no effect |
Which of the following describe posttranscriptional modifications commonly seen in mRNA of eukaryotes?
5â capping, 3â-poly-A tail addition, splicing |
3â capping, 5â poly-A tail addition, splicing |
heteroduplex formation |
5â capping, 3âpolyA tail addition, removal of exons |
In birds, females are the heterogametic sex. This means that
females have chromosomes in pairs. |
emales produce eggs. |
females determine the gender of their offspring. |
males have two identical sex chromosomes (ZZ) An anticodon on a tRNA has the sequence 5'âGCAâ3'. What would be the effect on translation if the G in the anticodon were mutated to a U?
|