Answer:
Protein
Explanation:
A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many essential biological compounds such as enzymes, hormones, and antibodies.
Answer:C). A phospholipid bilayer with proteins
Explanation: A cell membrane is a phospholipid bilayer with proteins embedded in it. The fatty acyl chains of the phospholipids are non polar and hydrophobic while the phosphate groups are polar and hydrophilic. The hydrophobic regions of the phospholipids interact with each by facing each other, forming a bilayer with a fluid interior. The polar head groups face outward interacting with the external environment of the cell. Proteins are embedded in this bilayer and they float in this sea of phospholipids. Proteins anchored to the membrane through interactions between the hydrophobic regions of the phospholipids and the amino acid side chains of the proteins. These lipids and proteins swim laterally in each face of the bilayer but movement from one face of the bilayer to another is restricted.
The most true answer from these choices is:
Methyl groups most often added to guanine-cytosine base pairs because they are held by three hydrogen bonds, and this decreases the probability of gene expression.
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Deposition by the river replenishes soil in the wetlands with sediment and nutrients illustrates a positive effect that the Nueces River has on the wetlands.
Option: C
Explanation:
A river in its lower course leave the high elevated area and enters into the flat land. In the lower course of the river deposition is the prime work of a river. Estuary, delta are some of the landform that formed in the lower course of a river. Here, Nueces estuary is formed where Nueces river enters into the gulf.
In this gulf a wetland is formed which supports aquatic life and a dwelling place for them and land species also. Here, river deposits all its sediments and replenish the soil of wetland with new sediments and nutrients.
