Is there supposed to be a photo attached?
Answer:
The correct option is (A).
Explanation:
The base-pairing rule illustrates the pairing of purine and pyrimidine bases in the construction of nucleic acids. Adenine and guanine are purines and pyrimidines are cytosine, thymine, and uracil.The total number of base-pair defines the size of the genome of an organism.
Uracil is exclusively present in the RNA. We can infer that purine base pairs with pyrimidine. So, adenine pairs with thymine in the DNA strand with the help of two hydrogen bonds and guanine pairs with cytosine that is supported by the presence of three hydrogen bonds.
In case of RNA adenine forms double bond with the uracil residue.
<span>The primary excitatory neurotransmitter in the brain and spinal cord is Glutamate. Glutamate is an amino acid that is responsible for binding receptors in the central nervous system and is found at almost all synapses. It helps transmit signals across the synapses.</span>
Answer:
Bound complement components, especially bound C3b and its inactive fragments, are recognized by specific complement receptors on phagocytic cells
Some protist can make their own food(Photosynthesis) , like algae. Some are like a fungus type such as slime mold, they decompose decaying matter.