Answer:
Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. Magnesium is an important component of chlorophyll. The concentration of magnesium ions is higher in the root-hair cells of plants than in the soil.
<span>The Mitochrondria of the eukaryotic cells.</span>
1. The carrier proteins via which sugar comes into pancreatic beta cells have HIGHER Km when compared to the carriers via which sugar comes into muscle cells at fasting blood sugar levels.
Explanation: A high Km amount shows a low affinity for the substrate. The carrier protein (GLUT4), which is basically observed in muscle cells, do possess a stronger affinity for glucose (low km 1.8-4.8mM) thereby making sure that maximum glucose is efficiently transported in tissues in situations where glucose concentration drops. While the carrier proteins located in beta cells (GLUT2) do show a high km ~20mM, as a higher km promotes for glucose sensing.
2. In order for muscle cells to raise sugar import INSULIN MUST BE PRESENT.
3. Oh, and glucokinase has a HIGH Km when compared to hexokinase.
Explanation: Glucokinase do possesses a minimal affinity (higher Km) for glucose as it will only function in situations of increased glucose concentration in serum.
4. Proton pumps are required for the release of transferrin from the transferrin receptor and iron form transferrin.
Explanation: H+ ATPases reduces the pH of the vesicle and results in transferrin to produce iron.
5. Iron Reductases Convert the iron to the active form in which it may be exported.
6. This happens in the Lysosome.
Explanation: Ferric iron is transformed into ferrous iron (which is the active type) through the activities of ferric reductase.
Answer: A. Plant
Explanation:
Plants have some of the most of complex cells of living organisms because they have different roles and structures to enable the plant to survive.
These include cells like the Parenchyma, Collenchyma, Sclerenchyma, Xylem and Phloem cells. Xylem cells for instance are complex cells located within the vascular tissues of plants and help transport water and minerals to the rest of the plant from the roots. Xylem cells look long and tracheal which is to enable them carry out the aforementioned roles.
Answer: c. iris – controls the pupil
Explanation:
The iris, a structure which is primarily made up of smooth muscles. These smooth muscles surrounds the pupil. The light enters the eye through pupil which is a black hole present in the middle of the eye. It allows the light to strike the retina. It controls the size of the pupil this way it helps in regulating the amount of light entering the eye. The pupil becomes wider in the darkness and becomes narrower when the light intensity is more. These actions are controlled by iris.