Why is SRY considered to be a master gene?
What will be an ideal response?
SRY is one of 78 genes found on the Y chromosome. It is responsible for the development of testes, the products of which produce male secondary sexual characteristics. If the SRY gene is mutated, the developing embryo will appear female and develop female sexual features; therefore, SRY is the master gene for male sexual traits.
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Based on what you know about eukaryotic cells, what is one of the arguments against using RNA as the genetic storage molecule?
A. Because RNA uses uracil instead of thymine, it cannot hold genetic information. B. RNA has a negatively charged sugar phosphate backbone. C. The structure of RNA does not allow for double-stranded base pairing. D. There is no current mechanism to package enough RNA to encode all the information needed by the cell. E. The secondary structure of RNA prevents its replication before cell division.
Contrast in microscopy is most commonly achieved by:
a. changing objectives for various specimens. b. increasing the resolution or resolving power. c. staining techniques. d. adding a blue filter to the light path.
Chloroplasts kept in the dark can continue to make sugar if provided with ____
a. NADPH, ATP, and CO2 b. NADPH and ATP c. CO2 and ATP d. NADPH, CO2, and ADP e. water and ATP
The concentration of a solution expresses the amount of solvent present.
Answer the following statement true (T) or false (F)