Answer:
Nucleotides
Explanation:
"These macromolecules consist of a large number of linked nucleotides, each composed of a sugar, a phosphate, and a base."
Hope this helps:
<em>DNA, RNA, and the Flow of Genetic Information</em>
https://www.ncbi.nlm.nih.gov/books/NBK21171/
Answer:
4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Explanation:
The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.
The nucleus! hope this helps :)
Answer: It is possible for two O bloody type to have a child of Blood type B which can be caused by mutation.
Mutation is the changes in genetic content or DNA . Although it is normal for two O blood type parents to have O type child but it is technically possible for O blood type parents to have child of A or B blood type which is due to changes in DNA. Changes in DNA can be caused when sunlight hit our bodies, conversion of food to energy , when our body absorb some chemicals and when our cells try to copy another DNA. The differences between the blood types A, B, and O is very small. This makes it possible for a mother of O blood type produce B egg or a father of O blood type produce B sperm which is caused by mutation.
For a parents with blood type O to have a child with B type blood, the parents blood type O would have to look like B type .
Explanation:
Mutation is the change in genetic material or DNA. It can lead to change in blood type of humans with different parents blood types. This mutation can be caused by chemicals we breathe in, exposure to sunlight and so on.
Answer:
Option C
Explanation:
Primase synthesizes DNA polymerase through the initiation of synthesis of RNA primer. DNA polymerase is able to add nucleotides in only one direction towards the direction of replication fork Hence, it add to the chain only at 3’ end and build new strand from 5’ to 3’ end.
The 5’ to 3’ strand is the leading strand and is easy to build as 5’ to 3’ progresses towards the replication fork and DNA polymerase also move in the same direction
Hence, option C is correct
