<h2>Answer:
</h2>
Option A) Active transport.
<h2>Explanation:
</h2>
- Active transport - Movement of molecules or ions from a lower concentration to a region of higher concentration(against a concentration gradient), by the use of enzymes and consuming energy(ATP), hence the substances move across plasma membrane against a concentration gradient.
- Osmosis is the process in which molecules of the solvent passes through a semipermeable membrane(plasma membrane in case of cell) from a less concentrated solution to more concentrated one along the concentrated gradient.
Energy is not required in this process and hence it is passive process.
- Diffusion is the movement of the molecules of a material from higher concentration to lower concentration.
- Facilitated diffusion is similar to diffusion, it the transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration by the help of a carrier molecule.
Result: Active transport happens against a concentration gradient.
Explanation:
The sequence of basis on the DNA molecule is what directs the sequence of amino acids in the protein molecule - that's how it all links together! So, the sequence of bases in DNA codes for the sequence of amino acids of a protein.
Answer:
7.8 moles are needed.
Explanation:
Given data:
Mass of oxygen produced = 125 g
Number of moles of mercury oxide needed = ?
Solution:
Chemical equation;
2HgO → 2Hg + O₂
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 125 g/ 32 g/mol
Number of moles = 3.9 mol
Now we will compare the moles of oxygen with mercury oxide.
O₂ : HgO
1 : 2
3.9 : 2×3.9 = 7.8 mol
The 5 characteristics of a mineral are: solid, inorganic, naturally occurring, definite chemical composition, and definite crystalline structure.
A part of all organic compounds is cells.