<span>The macromolecules DNA and RNA are referred to as the the nucleic acids. They are the polynucletoides, and have the nucletoide repeating monomers of a ribose sugar, nitrogenous base pair, and phosphate group.</span>
the answer is a it can be used as an energy source by organisms
To know what type of transport occurred the lab and collected data are needed. As they are not present an explanation of the different transport's types, will be given.
Water, proteins, ions, and molecules of different sizes can pass through the cell membrane using different types of transports. The transport that each molecule uses depends on the concentration, size, and polarity.
We can classify the types of transport as active and passive.
Passive transport is the one that does not need energy to happen since the molecules move from a place of high concentration to a one of lower concentration. In this group, we have:
- Simple diffusion: small molecules in high concentration on one side of the membrane; move to the other side due to the difference in concentration.
- Osmosis: water passes through the membrane from a place of low concentration of molecules to one of high concentration. Water moves inside or outside the cell to valance the concentration of solutes on both sides of the membrane.
- Facilitated diffusion: uses proteins to transport large molecules, ions, or hydrophobic molecules from one side to the other. In this type of transport, we have proteins that form channels so those hydrophobic molecules can pass through the lipid membrane, and carrier proteins, which binds to a specific molecule changing their shape and transporting the molecule.
Active transport needs the<em> energy</em> to transport molecules; since it goes against the gradient's concentration. In this group, we have:
- Sodium-Potassium pump: uses ATP to move sodium outside the cell and potassium to the inside. The ions with this transport go to where they are most concentrated.
In conclusion, there are different types of transport; they depend on the concentration or type of molecule. To find out what mechanism of transport occurred in the lab, look at the components of the experiment and analyze which of these transports could be present.
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Answer:
The question lacks options, the options are:
A) No proofreading will occur. B)The DNA will supercoil. C)Replication will occur via RNA polymerase alone.
D)No replication fork will be formed.
E)Replication will require a DNA template from another source.
The answer is D
Explanation:
Prior to division of any cell, its genetic material needs to be replicated. Ideally, in a bacterial cell, this replication starts at a particular nucleotide sequence called ORIGIN OF REPLICATION. An enzyme called DNA HELICASE then binds to the origin of replication and breaks the hydrogen bonds between the double-stranded DNA molecule to form a Y-shaped Replication fork, which serves as a template for DNA polymerase III to bind and begin to add nucleotides.
However, if a mutation occurs at a certain gene dNAb and alters the action of HELICASE enzyme. Thus, it prevents the helicase from separating the double-strands of the DNA molecule containing the gene. Hence, no replication fork will be formed and subsequently no template for DNA polymerase's action.