test #2 Flashcards
what molecule provides the energy for translation initiation?
GTP
which of the following statements best describes the function of aminoacyl tRNA synthetase?
a. it help tRNA synthesis proteins
b. it attaches a specific amino acid to a tRNA molecule
c. it cooperates with ribosomes to prevent RF’s binding to the P site
d. it provides energy required to attach a specific amino acid to a tRNA
e. it synthesizes tRNA molecules
b
during bacterial translation elongation, the charged tRNA pairs with the codon, and GTP hydrolysis occurs. what is released from the translation complex immediately following GTP hydrolysis?
a. RF
b. EF-Tu-GDP
c. uncharged tRNA
d. IF
e. fMet amino acid
EF-Tu-GDP
which segment of a eukaryotic protein is often removed as part of transmembrane passage or vesicle transport?
a. introns
b. leader regions
c. 5’-UTR
d. SRP
e. 3’ Poly-A-tail
b. leader regions
a _____________ is an enzyme that removes phosphate groups from an amino acid in a protein chain?
phosphatase
imagine you are a geneticist 60 tears ago attempting to decipher the genetic code. you create a synthetic mRNA composed of repeating UA dinucleotides. based on what we now know, if this mRNA was translated, what amino acids would you expect?
Tyr and Ile
suppose you have one plant with the genotype TTPpYy, and another plant that is recessive for all three traits. if you were to cross these two plants, what proportion of the offspring are expected to be dominant for all three traits?
1/4
an organism having the genotype AabbCcDDee is self-fertilized. assuming the five genes assort independently, what fraction of the progeny are expected to have a phenotype identical to that of the parents?
9/16
which of the following codons are synonymous?
a. CGC and AGG
b. UUU and AAA
c. UUA and AGG
d. AUG and UAA
a. CGC and AGG
a patient with monosomy is most easily diagnosed using what technique?
a. carrier testing
b. PCR
c. maternal serum screening
d. pedigree analysis
e. a karyotype
e. a karyotype
pre symptomatic genetic testing is a technique that could be used to identify which of the following examples?
a. mitochondria disorders
b. COVID-19
c. Down’s syndrome
d. Huntington’s disease
e. Tay-Sachs
d. Huntington’s disease
a couple comes to you for advice about genetic testing for a rare early-onset dominant condition. the paternal grandfather had the condition, but no one else in the family has had it including the male partner in this couple. what is the probability that they will have an affected child?
0%
