Distinguish between sense and nonsense mutations and describe the characteristics of a protein affected by each type of mutation
What will be an ideal response?
Sense mutations produce longer-than-normal proteins by changing a termination codon into one that codes for an amino acid. For example, an extended polypeptide chain would be produced by a single nucleotide substitution in the normal termination codon, allowing for the insertion of many additional amino acids before another stop codon is reached. Nonsense mutations change codons for amino acids into one of the three stop codons. This shortens the protein product. For example, this mutation could result in a protein that is 100 amino acids long instead of 105, and may have little or no effect on the function of the molecule. However, other nucleotide substitutions could have more serious phenotypic effects. In some cases, a single nucleotide substitution can cause a serious genetic disorder.
You might also like to view...
In vascular plants, the ____ generation is larger, more complex, and longer lived than the ____ generation
a. haploid gametophyte; haploid sporophyte b. haploid gametophyte; diploid sporophyte c. diploid sporophyte; diploid gametophyte d. diploid sporophyte; haploid gametophyte e. haploid sporophyte; haploid gametophyte
What process is described here? A concentration gradient of H+ ions is created in the periplasmic space by actively transporting the ions across the membrane using the energy liberated when carrier molecules are oxidized. When the H+ ions pass through ATPase, enough energy is generated to add phosphate groups onto ADP molecules.
A. Deamination B. The Calvin cycle C. Oxidative phosphorylation D. Fermentation E. Substrate-level phosphorylation
During contraction of your arm muscle:a
the I band shortens. b. the H zone shortens. c. the A band shortens. d. the I band and the H zone shorten. e. the I band, the H zone, and the A band all shorten.
Which is true concerning quiet/REM sleep?
What will be an ideal response?