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Step

step

1. In dentistry, a dove-tailed or similarly shaped projection of a cavity prepared in a tooth into a surface perpendicular to the main part of the cavity for the purpose of preventing displacement of the restoration (filling) by the force of mastication.

2. A change in direction resembling a stair-step in a line, a surface, or the construction of a solid body.

3. To move the foot in walking; to advance or recede by raising and moving one of the feet to another resting place, or by moving both feet in succession.

4. A prefix used before father, mother, brother, sister, son, daughter, child, etc, to indicate that the person thus spoken of is not a blood relative, but is a relative by the marriage of a parent; as, a stepmother to X is the wife of the father of X, married by him after the death of the mother of X. See Stepchild, Stepdaughter, Stepson, etc.


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Newbie question about the first life

... were engulfed by a cell but I haven't been able to find the source. If it's true, then I guess it was a bacterium that did this, thus taking a big step on the way to becoming the first eukaryotic cell, so bacteria and mitochondria must've developed independently and side by side before coming together. ...

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by piscilactovegetarian
Tue Feb 25, 2014 10:21 am
 
Forum: Molecular Biology
Topic: Newbie question about the first life
Replies: 14
Views: 736

Re: Increase in free energy in glycolysis

... from enthalpy (internal energy) - entropy (chaos). Also expressed as Gibbs Free Energy = Enthalpy - Entropy. The idea is that with each subsequent step of glycoysis there is more chaos and thus the entropy goes up and the free energy becomes more negative. The free energy is becoming more negative ...

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by daniel.kurz
Wed Feb 05, 2014 3:03 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
Replies: 3
Views: 639

A dilution question about RNA

Hello, I have a basic and probably silly question. I am isolating RNA with TRIzol. I have performed the basic steps and resolve the pellet in 50 uL water. I ve measured the concentration and it was 3313 ng/uL (Around 165 ug). Now my next step is DNase treatment. It says 1 unit ...

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by golgicik
Mon Feb 03, 2014 6:30 pm
 
Forum: Molecular Biology
Topic: A dilution question about RNA
Replies: 1
Views: 302

Increase in free energy in glycolysis

I'm reading about glycolysis in a general biology textbook. It says that in the first 5 steps the free energy increases with each step. Two of those steps are powered by ATP, but the rest are not. In those other steps, how does the free energy increase? What powers ...

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by cadamcross
Sat Feb 01, 2014 2:25 am
 
Forum: Molecular Biology
Topic: Increase in free energy in glycolysis
Replies: 3
Views: 639

Re: Am I the Next Step in Human Evolution?

I feel the same way I am a 14 year old East Burke High School Student I'm in 9th Grade and I look like a 20 year yet I lack a lot of Facial hair. I a lot of times feel like I'm irregular compared to other people other than my looks I have Visions in my Dreams I have been told I'm a Prophet of God. A...

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by ShawnMcquell
Thu Jan 30, 2014 10:24 pm
 
Forum: Evolution
Topic: Am I the Next Step in Human Evolution?
Replies: 23
Views: 23673
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