DNA replication in vivo requires a primer with a free 3' end. What molecular species provides this 3' end, and how is it provided?
What will be an ideal response?
The free 3' end is provided by an RNA primer; it is provided by the enzymatic activity of RNA primase.
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In general, repressor proteins that act to inhibit eukaryotic gene expression:
A. interfere with communication between Pol II and DNA-binding transactivators. B. block Pol II-mediated polymerization of ribonucleotides. C. bind to the C-terminal domain of Pol II. D. disrupt HMG protein-DNA interactions.
For monohybrid experiments, a testcross can result in
which of the following ratios? a. 1:1 b. 2:1 c. 9:3:3:1 d. 1:2:1 e. 3:1
Whe considering receptors for hormone molecules, we can say that, in general, _________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements best explains the data?
(A) The appearance of blue in the F1 generation of the pink and white cross demonstrates that flower color is not an inherited trait but is determined by the environment. (B) Flower color depends on stages of flower development, and young flowers are white, advancing to pink and then blue. (C) Since the F1 and F2 phenotypes of the pink and white cross do not fit the expected genotypic and phenotypic ratios, blue-eyed Mary must reproduce by vegetative propagation. (D) Flower color is an inherited trait, and the F1 and F2 phenotypes of the flowers arising from the pink and white cross can best be explained by another gene product that influences the phenotypic expression