Species Pairs Percent Divergence in a
Selected DNA Sequence
Human?chimpanzee 1.7
Human?gorilla 1.8
Human?orangutan 3.3
Human?gibbon 4.3
Human?rhesus monkey 7.0
Human?spider monkey 10.8
Human-tarsier 24.6
. Based on data in the accompanying table, which of the primates listed below is the most distantly related to humans?
a. gorilla
b. gibbon
c. orangutan
d. chimpanzee
e. rhesus monkey
e
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Which of the following is true of supercoiling?
A. The relaxed form of DNA is more stable and is therefore the preferred form in the cell. B. Most organisms maintain their DNA in a slightly overwound state in order to enhance strand separation during transcription and replication. C. Overwound DNA is in the B form so relaxed DNA has less turns than B-form DNA. D. Most organisms maintain their DNA in a slightly underwound state in order to compact their DNA. E. The relaxed form of DNA can only be maintained if the DNA is a closed circle.
The process of removing introns from mRNA and joining exons together occurs in a complex called the ____
a. ribosome b. anticodon c. lariat d. polysome e. spliceosome
A patient has a disease with symptoms in the outer ear, nose, larynx, and spine. Which cells are most likely to have a problem?
A. Erythrocytes B. Fibroblasts C. Chondrocytes D. Leukocytes E. Osteocytes
Clostridium difficile-associated diarrhea is usually preceded by
A) eating contaminated food. B) a blood transfusion. C) extended use of antibiotics. D) improper food storage. E) travel to an underdeveloped country.