#Question id: 27486
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 4403
#Unit 3. Fundamental Processes
Which of the following does (do) not require a DNA helicase activity?
a. SWI/SNF function b. Pol II open-complex formation
c. transcription-factor binding to DNA
d. deacetylation of histone tails
#Question id: 512
#Unit 1. Molecules and their Interaction Relevant to Biology
Arsenate affects glycolysis as it
A) competes with NAD+ for the binding site in 1,3-bisphosphoglycerate.
B) competes with phosphate for its binding site in glyceraldehyde 3-phosphate dehydrogenase.
C) produces a stable analog of 1,3-bisphosphoglycerate.
#Question id: 5325
#Unit 8. Inheritance Biology
Cystic fibrosis is caused by a recessive lethal gene and can be detected by an excess concentration of chloride in sweat. A normal man whose sister has cystic fibrosis, his normal wife whose brother has cystic fibrosis. What is chance of cystic fibrosis in their child?
#Question id: 7265
#Unit 5. Developmental Biology
Following statement regarding to the cascade of regulated RNA splicing controls drosophila sexual differentiation.
A. The Sex-lethal (Sxl)
protein, encoded by the sex-lethal gene, is the first protein to act in the
cascade and present only in female embryos.
B. Early in development, the Sxl gene is transcribed from a
promoter that functions only in male embryos.
C. Later in development, this male-specific promoter is shut
off, and another promoter for sex-lethal becomes active in both male and female
embryos.
D. In male embryos, however, in the absence of early Sxl
protein, exon 3 of the sex-lethal pre-mRNA is spliced to exon 2 to produce an
mRNA that contains a stop codon early in the sequence.
Which of the following is correct?