Which of the following processes does notcontribute to the formation of a biologically active form of a protein?
A. posttranslational modification of amino acids
B. degradation of mRNA
C. removal of one or more amino acid residues
D. formation of intrachain or interchain disulfide bonds
B
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The ability of some tRNAs to pair with different codons is described according to ____ as being due to
imprecise base pairing with the third base in the codon.
a. alternative splicing b. degeneracy c. exon shuffling d. the wobble hypothesis e. aminoacylation
If an organism with 64 chromosomes mates with a closely related organism with 62 chromosomes, the
most likely result will be
a. many unhealthy offspring due to hybrid breakdown. b. many unhealthy offspring due to hybrid inviability. c. no offspring due to hybrid sterility. d. sterile offspring due to hybrid inviability. e. sterile offspring due to hybrid sterility.
Carbon, in the form of carbon dioxide (CO2), enters the atmosphere in several ways. Which of the following is NOT a process by which carbon dioxide enters the atmosphere?
A) cellular respiration of plants B) transpiration by plants C) respiration by oxygen-breathing animals D) burning of fossil fuels, such as coal and oil
Leaflets are part of a more complex leaf called a(n) ________ leaf.
Fill in the blank(s) with the appropriate word(s).