Answer:
It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Explanation:
Lac operon is also referred to as Lactose operon.This operon helps in the transport and metabolism of lactose of many enteric bacteria.
It ensures that a cell dedicates resources to the production of enzymes involved in lactose metabolism only when lactose is available in the environment
Due to the fact that it would be a total waste to produce enzymes when no lactose is available or if another preferable energy source such as glucose were available. The lac operon uses a two-part control mechanism to ensure that the cell uses energy producing the enzymes encoded by the lac operon only when necessary to avoid wastage and abnormalities.
B. I, II, III
Mollusks have 3-chambered heat. They have gills and they have 1-way digestion.
Other characteristics of mollusks are:
1) Bilaterally symmetrical
2) Body has more than two cell layers, tissues and organs
3) body without cavity
4) body monomeric and highly variable in form, may possess a dorsal or lateral shells of protein and calcarous spicules.
5) has a nervous system with a circum-oesophagal ring, ganglia and paired nerve chords
6) has an open circulatory system with heart and aorta
7) has a pair of kidneys
8) reproduction normally sexual and gonochoristic
9) feed a wide range of material
10) live in most environment
Answer:
The trend shows that the Enzyme Pepsin is active and prefers the pH level of 2. While Trypsin Is much active at pH 8 and prefers that pH level.
Explanation:
You can tell by seeing the enzyme activity compared to the pH range. Enzymes are simply proteins which work around your body so pepsin since it is active in acidic levels (pH 2) is probably an enzyme found in the stomach.
The cerebrum<span> makes up most of the brain. It contains the four lobes of the brain and all of the neocortex. The </span>cerebellum<span>, or little brain is the small, tough structure that lies underneath the posterior or back part of the brain</span>
Answer:
a pigment metabolite from the destruction of hemoglobin
Explanation:
Bilirubin is a yellow pigment produced during the normal breakdown of hemoglobin as red blood cells die.
