The diagram of the molecule is attached with the answer.
Answer:
The correct answer is - 1. It is the template for the replication of genetic information.
Explanation:
The given molecule is a DNA molecule that is known as the molecule that takes genetic instructions in all living things and carries them to the next generation of cells.
The DNA molecule has two strands known as double helix formed by winding around one another, backbone of each strand has sugar (deoxyribose) and phosphate groups.
DNA plays a role of the template for the replication of the genetic information during DNA replication as well as transcription during protein synthesis.
For the second one A. a moldFirst one is:
Answer: The probability of having an offspring with type A blood is 1/4.
Explanation: Since each of the parents have a recessive allele for blood type O, their genotypes are IAi and IBi for the father and mother respectively. A cross between them will produce four offsprings: one with type AB blood, one with type A blood, one with type B blood and one with type O blood.
See the attached punnet square for more information
Answer:
R/ Protects sperm antigens from exposure to the cells of the immune system.
Explanation:
In mammals there is a barrier (blood-testis barrier) within the seminiferous tubes formed by tight junctions between Sertoli cells that separates spermatogonias from primary spermatocytes. This barrier separates the seminiferous tube into two compartments, the basal and the adluminal. The basal compartment between the basement membrane and the tight junctions can be accessed by elements of the plasma and immune cells, while the second compartment is not.
The tricuspid valve shuts. This prevents blood from flowing backward into the right atrium while the ventricle contracts. So, your answer will be the Tricuslid Valve. Hope I helped!