Which statement is true about carbohydrates?
A) They consist of simple sugars which contain carbon, hydrogen, and oxygen in a 2: 1: 2 ratio.
B) They are usually hydrophobic.
C) They are a component of the cell wall of different types of organisms.
D) They have primary, secondary, tertiary, and quaternary structure.
E) They maybe saturated or unsaturated.
Answer: C
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Plant cell growth is confined to:
A. flowers. B. meristems. C. within the cell walls. D. photosynthetically active tissues.
The result of the process shown in green in the lower half of the figure is _____
1.a positively charged ion
2.a covalent molecule
3.a negatively charged ion
4.a negatively charged molecule
During DNA replication the 3' to 5' exonuclease activity of DNA polymerases I and III is required for?
a. polymerization of new DNA strands b. joining of Okazaki fragments following removal of RNA primers c. removal of RNA primers d. proofreading of mistakes made during DNA synthesis
Answer the following questions true (T) or false (F)
1. Louis Pasteur is considered the Father of Microbiology because of the many carefully conducted experiments and observations he made with microbes. 2. Gene therapy is a modern approach to preventing infectious disease. 3. Koch's postulates can be used to determine the causes of infectious diseases.