According to the most widely accepted hypothesis, the origin of the nuclear genome involved:
A. an endosymbiotic relationship between an archaeon and a bacterium.
B. a symbiotic relationship between an archaeon and a bacterium.
C. an endosymbiotic relationship between two archaeons.
D. an endosymbiotic relationship between two bacterium.
E. a symbiotic relationship between two archaeons.
Answer: A
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Which of the statements about haptens is correct?
A. Haptens are usually large proteins. B. Haptens are generally large polysaccharides. C. Haptens are typically lipid molecules. D. Haptens are usually small organic molecules.
After much debate, it is decided that the family will vacation at Myrtle Beach in South Carolina this year. Swimsuits and other beach accoutrements are purchased and packed. Unfortunately, upon arrival, they are faced with signs that say, “WARNING! Beware: Portuguese men-of-war have been spotted along the shore! Beaches closed until further notice.” Upon returning home, the oldest child exclaims, “I never thought jellyfish could ruin our whole vacation!” The parents frown at the child, for they are biologists and he has committed a grave taxonomic error. What error has he made?
a. Portuguese men-of-war are not jellyfish, they are Scyphozoans. b. Portuguese men-of-war are not jellyfish, they are Anthozoans. c. Portuguese men-of-war are not jellyfish, they are Hydrozoans. d. Portuguese men-of-war are not jellyfish, they are Cubozoans.
Give three differences between DNA and RNA
What will be an ideal response?
The terminal electron acceptor in respiration may be:
a. oxygen b. Sulfate c. NAD d. an organic molecule e. NADH f. FAD A. a, b, and d B. a, d, e and f C. a, b, c, d, e and f D. a, b, c and e E. c, d, and e