Answer:
A) One band of intermediate density and one band of heavy density.
Explanation:
According to semi conservative model of replication the two DNA strands separate during replication such that the new DNA molecule has one parental strand and one new strand. In this experiment, originally E.Coli cells were grown in 14N medium so all the DNA strands had 14N. When the medium was changed to 15N, only 15N would be available to the cells for replication.
After first round of replication all DNA molecules would be of intermediate density as one strand would be old 14N strand and another would be new 15N strand. After second round of replication 15N strand would be formed from both 14N strand and 15N strand. So, one band will be formed of intermediate density (14N-15N) and another would be of heavier density (15N-15N).
C) DNA
Inside the nucleus, DNA and proteins together form chromosomes.
Answer:
Messenger RNA (mRNA) carries the instructions for making proteins. Like DNA, proteins are polymers: long chains assembled from prefab molecular units, which, in the case of proteins, are amino acids. A large molecular machine* called the ribosome translates the mRNA code and assembles the proteins.
The correct answer is: Physical Neglect.
Physical neglect is a term used to describe a condition when a parent does not provide a child with basic physical needs. This means that children do not have conditions to be healthy and safe such as no adequate food, shelter, clothing or healthcare. As a consequence, serious injuries or illness might occur.
Of course not , also thanks for the free points :)
