When double-stranded dna is heated at neutral ph, which change does not occur?
a) the absorption of ultraviolet (260 nm) light increases.
b) the covalent n-glycosidic bond between the base and the pentose breaks.
c) the helical structure unwinds.
d) the hydrogen bonds between a and t break.
e) the viscosity of the solution decreases.
Answers: 1
Chemistry, 21.06.2019 16:30
Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)
Answers: 3
Chemistry, 21.06.2019 20:00
Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?
Answers: 1
Chemistry, 22.06.2019 10:50
A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.
Answers: 3
When double-stranded dna is heated at neutral ph, which change does not occur?
a) the...
a) the...
Chemistry, 10.10.2020 19:01
Mathematics, 10.10.2020 19:01
Mathematics, 10.10.2020 19:01
Mathematics, 10.10.2020 19:01
English, 10.10.2020 19:01
Spanish, 10.10.2020 19:01
Mathematics, 10.10.2020 19:01
Arts, 10.10.2020 19:01