Which of the following groups do not contain any species that are autotrophs?
A. Archaea
B. Fungi
C. Bacteria
D. Protista
E. Plants
Answer: B
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Answer the following statements true (T) or false (F)
1. A magnifying glass could be considered a simple microscope. 2. The total magnification achieved when the oil immersion lens is used is 1,000 ×. 3. Fluorescence microscopy is often used in immunology laboratories. 4. The resolving power of electron microscopes is much better than that of compound light microscopes because the wavelength of electrons is much longer than that of visible light. 5. Primary syphilis is usually diagnosed in the clinical microbiology laboratory by the use of a scanning electron microscope.
Which of the following is NOT a protein involved in DNA replication?
A. replication fork. B. single-stranded binding proteins. C. DNA ligase. D. topoisomerase. E. helicase.
Two strands of DNA that have been cut by an endonuclease can be sealed together by a(n)
A. methylase enzyme. B. protease enzyme. C. polymerase enzyme. D. ligase enzyme. E. exonuclease enzyme.
A signal sequence in the polypeptide chain targets all but _______ proteins to the rough ER surface.
a. secreted b. plasma membrane c. mitochondrial d. lysosomal