The ________ is a stiff, flexible rod that, at some point during the development of all chordates, extends along the length of the body, sandwiched between the digestive tract and the nerve cord
Fill in the blank(s) with correct word
notochord
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Eukaryotic and prokaryotic organisms differ in how they process genetic information. Which statements best explain one of these differences?
A. In prokaryotes, translation of the mRNA begins before transcription is complete. In eukaryotes, transcription and modification of the mRNA is completed before translation begins. B. In prokaryotes, genes are transcribed directly into polypeptides. In eukaryotes, genes are transcribed into RNA which is used to assemble polypeptides. C. In prokaryotes, translation occurs before genes are transcribed into mRNA. In eukaryotes, genes are transcribed into mRNA which is then translated into polypeptides. D. In prokaryotes, introns are removed before genes are transcribed into mRNA. In eukaryotes, introns are removed after genes are transcribed into mRNA.
Which of the following subdisciplines is concerned with the expression of RNA molecules?
A. proteomics B. genomics C. metagenomics D. transcriptomics E. phylogenetics
The ____ provides evidence that RNA molecules generated the first proteins
a. redundancy of the genetic code b. ability of rRNA to catalyze the formation of peptide bonds between amino acids c. polymerase activity of some ribozymes d. cleavage of mRNA molecules by rRNA e. physical structure of polypeptides
A pear plant with the genotype Aa can produce gametes containing:a
either A or Aa. b. only the dominant A. c. only the recessive a. d. either A or a. e. either AA, Aa, or aa.