Question

Fred is studying his notes from anatomy class. One list in his notes describes features of a CNS structure.

Answer 1

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The central nervous system consists of the brain and spinal cord. The brain plays a central role in the control of most bodily functions, including awareness, movements, sensations, thoughts, speech, and memory. Some reflex movements can occur via spinal cord pathways without the participation of brain structures.

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Answer 2

Answer:

DNA is the genetic material made up of nucleotides each nucleotide consists of phosphate group, sugar group and nitrogen bases (Adenine, thymine, guanine and cytosine). It is a spiral structural called doubled helical made up of two strands.

The phosphate and sugar are on sides and nitrogen bases in between, Now Adenine pairs with thymine and guanine with cytosine. DNA is tightly coiled to form chromosomes. It makes the genetic material and stores information.

Salient features of double helix structures of DNA-

1. It is made up of 2 polynucleotide chains and backbone is made up of sugar.

2. Strands are joined by hydrogen bonds between purines and pyrimidines

Explanation: