Which one of the following is a symptom of botulism?
A) elevated stroke volume
B) paralysis of muscles used for breathing
C) cough yielding green phlegm
D) immune system attack of connective tissue
E) rash
B
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The first primates with an angled skull base that were probably able to make a wide range of sounds to aid speech were
A) Homo habilis. B) Homo erectus. C) Homo afarensis. D) Homo sapiens.
The DNA sequence below encodes the first five amino acids of a large protein. 5? ATGTTAGGATATCAG 3? 3? TACAATCCTATAGTC 5? a. Identify the coding and template strands. b
Write the sequence and polarity of the mRNA transcript produced by this sequence. Where does this process occur in eukaryotes? c. Write the amino acid sequence of the amino acids produced using the three-letter code for amino acids. (See genetic code table in text.) Where does this process occur in eukaryotes?
RNA molecules can both carry genetic information and be catalytic. This supports the proposal that
a) free nucleotides would not have been necessary ingredients in the synthesis of new RNA molecules. b) protobionts had an RNA membrane. c) RNA is a polymer of amino acids. d) RNA was the first hereditary information. e) RNA could make energy.
One form of hemophilia is caused by a sex-linked recessive gene. Assume that a man with hemophilia marries a phenotypically normal woman whose father had hemophilia. What is the probability that their first son will have hemophilia?
A) 1/16 B) 1/2 C) 1/4 D) 3/4 E) 1/8