Answer:
The right answers are mentioned in the picture.
- A base pair (bp) is the pairing of two nucleobases located on two complementary strands of DNA or RNA. This pairing is carried out by hydrogen bridges. There are four types of nucleic bases: A-T-C-G, these letters Adenine, Thymine, Cytosine, and Guanine. A with T and C with G.
- It is also necessary to take into account the antiparallel character of the DNA strands. If a strand is in the 5 '3' direction, its complete strand is in the 3 '5' direction.
Answer;
D. The Open Marine ecosystem
Explanation;
An ecosystem
is the lowest level of environmental complexity that includes living (biotic factors)and nonliving factors (abiotic factors).
-The Open marine ecosystem contains the fewest photosynthetic producers, this is because most producers can't live or survive in an areas with the lack of nutrients or sun light. They need nutrients for growth and also sunlight to undertake the process of photosynthesis which helps them make their own food.
The type of protein that plays an important role in transmitting signals in the nervous system is : A. Ion channel membrane proteins
The opening and closing of ion channel membrane proteins leads to changes in membrane potential which conducts information over an axon or synapses
hope this helps
The right answer is D.
A codon is a sequence of three nucleotides on a messenger ribonucleic acid (mRNA) specifying one of the 22 proteinigenic amino acids whose succession on the messenger RNA determines the primary structure of the protein to be synthesized. As the messenger RNAs consist of a succession of several tens to several hundreds of nucleotides, it is also several tens to several hundreds of amino acids that can thus be assembled linearly to form protein chains.
