(1) they keep toxic substances out of the cell;
(2) they contain receptors and channels that allow specific molecules, such as ions, nutrients, wastes, and metabolic products, that mediate cellular and extracellular activities to pass between organelles and between the cell and the outside environment;
(3) they separate vital but incompatible metabolic processes conducted within organelles.
Answer:
The plants may make toxins for human consumption.
Explanation:
Answer:
Topoisomerase
Explanation:
Topoisomerases are enzymes that produce changes in the topology of the DNA during replication, transcription, traduction, or reparation processes. They can cut one or both strands and in order to relieve torsional stresses in the supercoiled structure of DNA. With this, they help to maintain the chromosome's integrity. There are two types of topoisomerases: topoisomerase I (it cuts only one strand of DNA) and topoisomerase II (it is able to cut both strands of DNA).
The safety procedural step that must always be performed
when setting up a vacuum filtration apparatus is that first, you should always
wear the proper protective equipment, next is that the vacuum filtration—you should
clamp the flask of which is needed, securely to the ring stand. It must be
secure or it may be in the way of performing the experiment.
Answer:
The reason why there is so much diversity of life, despite the fact that DNA is the same for all living things, the pairings are always the same and there are only six components that make up the DNA, is that sequences of base pairs are different.
Explanation:
DNA is the molecule that contains all the genetic information, whose structure consists of four nitrogenous bases, adenine, guanine, thymine and cytosine, plus deoxyribose and a phosphate group. This DNA molecule constitutes the basis of life and inheritance of all living beings.
The nitrogenous bases of DNA are found in a number and specific sequences, which determine the proteins and biomolecules that must be synthesized in the cells.
What makes different types of living beings and diversity of life is the length of the DNA and the sequence of bases that form part of each molecule.
The other options are not correct because:
- <em>The sugar component of DNA is always the same, not different.
</em>
- <em>Organisms always use DNA in the same way.
</em>
- <em>The DNA molecule is always the same.</em>
