Following peptide bond formation between the amino acid in the A site on the ribosome and the growing polypeptide
chain, the tRNA in the A site:a.
releases the growing polypeptide chain.
b. picks up another amino acid to add to the chain.
c. moves to the P site of the ribosome.
d. forms a peptide bond with A site of the ribosome.
e. forms a covalent bond with the P site of the ribosome
c
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The release of which hormone from the posterior pituitary causes the initial contractions of the smooth muscle in the uterus?
a. estrogen b. prostaglandins c. oxytocin d. prolactin
You experimentally change the DNA sequence directly upstream of a start codon of an operon in E. coli to investigate the function of this region of DNA
Analysis reveals that after the change the same amount of mRNA is made from the operon, but there are very few proteins made from the operon. What is the most likely function of the DNA sequence that you changed? A) The DNA sequence likely functions as a ribosome-binding site. B) The DNA sequence likely functions as a promoter. C) The DNA sequence likely functions as a termination sequence. D) The DNA sequence likely functions as in transcriptional regulation.
The largest and oldest treesĀ in the world that are pollinated by animalsĀ are conifers.
Answer the following statement true (T) or false (F)
How does the highly acidic fluid in the stomach become slightly basic almost immediately upon entry into the small intestine?
A) The acids are absorbed by the small intestine as soon as they leave the stomach. B) The acids in this fluid are neutralized by the amylase secreted from the pancreas. C) The acids in this fluid remain in the stomach and only the partially digested food enters the small intestine. D) The acids in this fluid are neutralized by the sodium bicarbonate secreted from the pancreas.