The E. coli enzyme responsible for creating unsaturated bonds from saturated bonds in the cell membrane fatty acids at a lower environmental temperature is ________
Fill in the blank with correct word.
Answer: desaturase
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There are sixty-one codons that each specify the addition of a specific amino acid, and three stop codons for which there is no corresponding amino acid. However, there are only about forty tRNA molecules, representing forty anticodons
How is that possible? A) Only about forty of the recognized sixty-one codons are present in mRNA. B) An anticodon forms hydrogen bonds with the codon; it must match the first two bases of the codon, but is less specific with respect to the third base. C) There are tRNAs that can bind one of two related amino acids. D) Only twenty of the codons are activeâ€"one for each amino acid.
Evergreens are plants that maintain their leaves in all seasons and include trees such as
As elevation increases, O2 ____
a. availability increases b. availability decreases c. availability remains constant d. levels increase, but there is none present above 20,000 feet e. levels decrease, until there is none present above 20,000 feet
Eukaryotic post-transcriptional modifications occur in the _____
a. cytoplasm b. mitochondria c. nucleus d. ribosome e. endoplasmic reticulum