The number of similarities in certain DNA or RNA nucleotide or amino acid sequences may be used as a molecular
clock to indicate how much time has passed since the groups branched from a common ancestor.
________________ Indicate whether the statement is true or false.
False - differences
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What type of receptor is not an enzyme, but is directly associated with an enzyme that can hydrolyze GTP?
A. Channel-linked receptor B. Enzymatic receptor C. G protein-coupled receptor D. Steroid hormone receptor
Two different nucleic acids can ________ by annealing at their complementary sites.
A. covalently bond B. hybridize C. ligate D. form a peptide bond
Answer the following statements true (T) or false (F)
1. The pattern of embryonic expression for a specific gene shown by RNA in situ hybridization and a GFP fusion protein will always be identical. 2. Site-specific recombination systems, such as Flp recombinase/FRT sites, can function only in a single species. 3. A barrier element between a gene and heterochromatin would prevent that gene from being transcriptionally silenced by heterochromatin spreading. 4. Kinetochores include motor proteins that exert pulling forces on spindle microtubules. 5. Both Spo11 and Cas9 are enzymes that create double-strand breaks in DNA.
What are rounded pads of fatty tissue lying along both sides of the vaginal opening and are covered with pubic hair?
A. labia majora B. fallopian tubes C. labia minora D. seminiferous tubules