Answer:
the correct answer is 36
Explanation:
The two substances are sodium chloride and lead nitrate
In case of sodium chloride;
mass of water = 100 kg
solubility of sodium chloride = 54 g / 100 g of water
Therefore the mass of sodium chloride required for full saturation,
L = (54/100) x 100 kg = 54 kg
In case of lead nitrate;
mass of water = 200 kg
mass of lead nitrate = 36 kg
if the solution is fully saturated, solubility of lead nitrate (g per 100 g of water)
k = (36/200) x 100 g = 18 g
k can be also written as 18 kg per 100 kg of water.
thus the difference in k and l = (54-18) = 36.
Protein structure is the three-dimensional arrangement of atoms in a protein molecule. Proteins are polymers — specifically polypeptides — formed from sequences of amino acids, the monomers of the polymer. A single amino acid monomer may also be called a residue (chemistry) indicating a repeating unit of a polymer. Proteins form by amino acids undergoing condensation reactions, in which the amino acids lose one water molecule per reaction in order to attach to one another with a peptide bond. By convention, a chain under 30 amino acids is often identified as a peptide, rather than a protein.[1] To be able to perform their biological function, proteins fold into one or more specific spatial conformations driven by a number of non-covalent interactions such as hydrogen bonding, ionic interactions, Van der Waals forces, and hydrophobic packing. To understand the functions of proteins at a molecular level, it is often necessary to determine their three-dimensional structure. This is the topic of the scientific field of structural biology, which employs techniques such as X-ray crystallography, NMR spectroscopy, and dual polarisation interferometry to determine the structure of proteins.
Protein structures range in size from tens to several thousand amino acids.[2] By physical size, proteins are classified as nanoparticles, between 1–100 nm. Very large aggregates can be formed from protein subunits. For example, many thousands of actin molecules assemble into a microfilament.
A protein may undergo reversible structural changes in performing its biological function. The alternative structures of the same protein are referred to as different conformational isomers, or simply, conformations, and transitions between them are called conformational changes.
Answer;
Low birth weight.
One of the most consistent and best documented effects of cigarette smoking during pregnancy is low birth weight.
Explanation;
Smoking during pregnancy has various effects on the fetus, causing a baby to be born early or to have low birth weight which makes it more likely for the baby to get sick and stay in the hospital longer.
Additionally; smoking during and after pregnancy is a risk factor of Sudden Infant Death Syndrome.
