If a certain stretch of DNA reads ATTACGAG, what would the corresponding amino acid sequence be?
What will be an ideal response?
Nothing. The first codon codes for "stop."
Analyze and Evaluate the Concepts (Essay)
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The enzyme required to attach the sticky ends of DNA and used when splicing DNA fragments into other DNA is ________.
A. helicase B. ligase C. endonuclease D. reverse transcriptase
You have just invented a time machine and you want to investigate the past (the dream of every paleontologist!). When is the earliest time in Earth history that you could go back and not have to have an oxygen tank so that you could breathe normally?
A. Cambrian Period B. Phanerozoic Eon C. Archaean Eon D. Quaternary Period E. Devonian Period
If red (RR) is crossed with white (rr) and produces a
pink flower (Rr), and tall (D) is dominant to dwarf (d), the F2 phenotypic ratio from a cross of RR dd with rr DD would be a. 9:3:3:1. b. 1:1:1:1. c. 1:2:2:4:1:2:1:2:1. d. 3:6:3:1:2:1. e. none of these.
Which example shows nonevolutionary change in a population?
A) an increase in mosquitoes that are resistant to insecticide B) plants in a dry climate that have faster-growing roots than plants found there 20 years ago C) after decreases in airborne soot, a change in the most common color of moths D) an increase in the number of people diagnosed with colon cancer