Describe the three steps of translation
What will be an ideal response?
Translation has three steps: initiation, elongation, and termination. Initiation begins when mRNA binds to a small ribosomal subunit and the anticodon of the initiator tRNA carrying the amino acid methionine pairs with the AUG codon of mRNA. During elongation, amino acids are added to the growing polypeptide chain. Termination occurs when the ribosome reaches a stop codon. Proteins called release factors bind to stop codons; then the polypeptide, mRNA, and tRNA are released from the ribosome.
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A species that faces extinction in all or part of its range is:
a. endangered b. threatened c. rare d. endemic e. exotic
Diffuse interactions often occur among competing species but never among predator-prey species
Indicate whether the statement is true or false
Which of the following best describes the function of the coenzymes NAD+ and FAD in eukaryotic cellular respiration?
(A) They participate in hydrolysis reactions by accepting protons from water molecules. (B) They participate directly in the phosphorylation of ADP to ATP. (C) They serve as final electron acceptors in the electron transport chain. (D) They accept electrons during oxidation-reduction reactions.
Birds that aggregate in larger leks are generally _____ at attracting females and achieve _____ successful copulations.
Fill in the blank(s) with the appropriate word(s).