UV rays from the sun cause a specific type of improper base pairing called a thymine dimer. If a cell cannot correct this problem, the section of DNA can be removed, causing a deletion of several nucleotides. What will this cause?
A) A point mutation forms that leads to a change in one amino acid.
B) A point mutation forms that leads to changes in a handful of amino acids.
C) The codons shift by one letter, and all the codons before the mutation are changed.
D) The codons could shift by one letter, and all the codons after that point would be off.
D
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Amphetamines make persons who use them feel
a. very drowsy. b. somewhat relaxed. c. sedated. d. more alert. e. delirious.
You find a multicellular, eukaryotic organism that carries out photosynthesis and produces dependent embryos. It is classified as a(n) ________
Fill in the blank(s) with correct word
The stages of mitosis occur in what order, first to last?
a) anaphase -> metaphase -> prometaphase -> prophase -> telophase b) prophase -> prometaphase -> metaphase -> anaphase -> telophase c) prometaphase -> metaphase -> prophase -> telophase -> anaphase d) metaphase -> prometaphase -> prophase -> telophase -> anaphase e) prophase -> metaphase -> prometaphase -> anaphase-> anaphase -> telophase
If a DNA sequence reads TTGCGATCG, what mRNA will it encode?
A) AACGCUAGC B) TTGCGUTCG C) UUCGCTUGC D) AACGCTAGC E) TTGCGATCG