Answer:True
Explanation:Basically thymine diamers are mismatched pairs (thymine binds with another thymine instead of binding with adenine) and may lead to unwanted results so the mismatching can be repaired by using two methods which are as follows :
1-the PRE enzyme activated by blue light breaks the thymine diamer and some of the surrounding bonds the strand is cut and DNA polymerase then restores the normal base pairing
2-UVR system breaks dimer creating a gap when a gap is created and the molecules appear unpaired it is filled by proof readers hence restoring normal base pairing.
Answer:
The inducer will combines with the repressor and inactivates the pathway.
Explanation:
Inducer is a term in Molecular Biology, which represent a molecule or substance that has the capability to activate the transcription of a gene, where by it joins with and then inactivates a genetic repressor.
In other words, the inducer binds with the repressor in order to prevent the RNA polymerase to combine to the DNA, and chemically produce mRNA, this is done by repressor proteins combining with the DNA strand.
Inducer specifically makes repressor to change shapes, which will make it not combine with the DNA, and therefore, allow formation of transcription, such that expression of gene will eventually occur.
Answer: True
Explanation:
Dysmenorrhea can be define as a condition in which pain occurs during menstrual cramps, that is due to uterine contractions.
Primary dysmenorrhea can be define as commonly occurring menstrual cramps. The secondary dysmenorrhea results from a disorder and pain in the reproductive organs.
Answer: The genotype for the parent organism whose genotype is unknown is Ff.
Explanation: Let (F) represent the allele for purple which is dominant over (f) and (f) represent the allele for white.
The parent organism whose genotype is unknown is heterozygous for purple colour (Ff).
A cross between Ff and ff will produce four offsprings: two of which are Ff (heterozygous for purple colour) and two are ff (white).
Ff x ff = Ff, Ff, ff and ff.
Since (F) is dominant over (f), (Ff) will manifest as purple while (ff) will manifest as white. Therefore, half of the offsprings are purple while the other half are white.
See the attached punnet square for more information
Answer:
The following are the two functions of citric acid in the feta cheese:
1. Coagulation, that is, the chemical reaction of citric acid with proteins in milk leads to separation of curd and whey.
2. The citric acid functions as a chelating agent, which is required for syneresis, that is, for controlling the moisture content.
The following are the two functions of agar in the feta cheese:
1. Feta means to slice, and agar offers sliceable texture to the feta cheese as it produces a solid gel-like composition.
2. It is a vegetarian alternative for gelatin and exhibits higher gelling properties.