Answer the following questions true (T) or false (F)
1. The purple sulfur bacteria carry out oxygenic photosynthesis.
2. Cocci can be spherical as well as kidney-shaped.
3. Some strains of Staphylococcus aureus can invade the body and cause diseases such as pneumonia and bacteremia.
1. FALSE
2. TRUE
3. TRUE
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The high productivity of coral reefs is a direct result of:
a. the large numbers of phytoplankton and algae living on reefs. b. the tight symbiotic relationship between coral polyps and zooxanthellae. c. the high concentration of nutrients in tropical waters. d. the upwelling of tropical waters.
Which of the following is a fossil?
a. An insect encased in 10-million-year-old tree sap b. A woolly mammoth frozen in Arctic permafrost for the last 50,000 years c. Mineral-hardened remains of a whale-like animal found in an Egyptian desert d. An impression of a plant leaf in a rock e. All of these could be considered fossils
In pre-mRNA processing, ____
a. exons are spliced out and used to produce ribosomal subunits b. introns are spliced out and combined to form complete proteins c. introns are spliced out and combined in the tRNA d. exons are spliced out and the introns are combined in the mature mRNA e. introns are spliced out and the exons are combined in the mature mRNA
This ebola protein interferes with interferon production.
a) VP-35 b) L c) VP 30 d) GP 125