Answer: As a fertilized human egg divides, it first becomes a solid ball of cells, the morula. ... The cells of the outer layer of the blastocyst eventually form part of the placenta. Inside the ball is a small clump of cells, the inner cell mass, that will form all the tissues in the body.
Explanation:
Answer:
A group of blood disorders generally passed on from the parents to the offspring is known as SCD or sickle cell disease. Of the disease, the most common is the SCA or sickle cell anemia. In the disease, the red blood cells comprise an abnormal form of the oxygen-carrying protein hemoglobin.
Generally, humans comprise hemoglobin A, A2, and F types. Of the three types, the hemoglobin F dominates till the age of 6 weeks, after which hemoglobin A dominates till the end of life. However, in the persons diagnosed with SCA, at least one of the beta-globin subunits in hemoglobin A gets substituted by a different form known as hemoglobin S. In the disease, a single nucleotide mutation in the beta-globin gene takes place, in this at 6th position, the glutamic acid gets replaced by Valine.
These types of factors are called Constants, or controlled variables. If you have an experiment that is lacking a controlled variable, it’s near impossible to determine the outcome.
Out of the following given choices;
a) The enzyme must be stable to very high pressures.
b) The enzyme must be stable in the presence of hydrogen.
c) The enzyme must be stable both in the presence of detergents and to high pressures.
d) The enzyme must be stable both in the presence of detergents and to moderately high temperatures.
The answer is D. Subtilisin is a non-specific protease enzyme hence its use to remove protein stains. For its to be used with detergents it has to be stable in the presence of detergents. Since detergents work optimally in moderately high temperatures, Subtilisin must also be stable at the same temperatures.
