In the equation describing Tm of DNA: Tm = 81.6 +0.41(GC %) + 16.6 log [C+], the term 81.6 °C represents a constant i.e. the temperature necessary to melt dsDNA at any salt concentration and GC content. This temperature is required for: a. Breaking hydrogen bonds between bases. b. Breaking hydrogen bonds between GC pairs. c. Stabilizing conformation of single-stranded DNA. d. Breaking stacking interaction between bases results in the unwinding double-helix structure of DNA existing in B crystallographic conformation followed by breaking hydrogen bonds between bases. e. Breaking stacking interaction between bases, resulting in the unwinding double-helix structure of DNA existing in A crystallographic conformation.

Assuming the ultrasound beam strikes the muscle layer at 90◦ , how wide will the fat muscle boundary appear in the ultrasound image?

Can you help me with the name of labels

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Letter D please what is called!

The power stroke happens when __________________________________________________________.   The cross bridge persists until _______________________________________________________________.      Explain what has to happen to return a muscle to resting length.

sign (+) for positive and a "minus" sign(-)

А III о B с

(d) OH NaOH

The carpus (wrist) relative to the shoulder would be: