Answer: number of electron in respective sub shell or orbital
Explanation:
Answer:
Cystein, threonine and tryptophan can form hydrogen bond with progesterone
Explanation:
Those amino acids have -OH or H subunit in their side chain and these moities are very esential for hydrogen bond formstion with progesterone
A hydrogen bond can be said to be a partial intermolecular bonding between a lone pair on an electron rich donor atom, particularly highly electronegatine elements like nitrogen, oxygen, or fluorine and the antibonding orbital of a bond between hydrogen (H) and another more electronegative atom or group. Dotted or dashed line is always used to indicates the hydrogen bond.
Hydrogen bonding can also be seen existing between water molecules or hydrogen fluoride molecules since each molecule contains hydrogen bonded to a hyghly electronegative element.
Answer:
Observational study
Explanation:
An investigation of what happened over the years to the people who were exposed to radiation during the 1986 Chernobyl nuclear disaster would be termed <u>an observational study</u> because it will require observing subjects and finding out if there is a kind of correlating factor in the subjects that could indicate the level of exposure to the nuclear radiation.
There are basically two types of research studies:
1. Observational studies
2. Experimental studies
Observational studies involve just the observation of subjects and trying to find out some correlation factors. This kind of study could be prospective when it deals with what could happen in the future based on certain factors or retrospective when it considers what has already happened. An observational study can be cross-sectional, case-only, case-control, or cohort study.
Experimental studies are also referred to as randomized or controlled trial studies. Here, subjects are grouped and each group receives a different treatment in order to isolate the effect of a particular factor or variable relating to the treatment.