Answer:
Proteins play a role in transport, enable movement, provide structure and support, and help make chemical reactions happen.
Explanation:
I'm not quite sure if this was your question, but these are the functions of protiens.
Answer:
a. True, b. False, c.True, d. True
Explanation:
a. Base excision repair is started by a DNA glycosylase that recognizes the changes and removes the altered base by cleavage of the glycosidic bond binding the base and the deoxyribose sugar together.
b. Nucleotide excision repair works by a cut-and patch mechanism that removes their heavy lesions, including pyrimidine dimers and nucleotides . Endonucleases are responsible for the lesion of the damaged strand.
c. Nucleotide excision repair is initiated by the proteins namely UvrA, UvrC, and UvrB in Escherichia coli.
-UvrD (helicase II) later removes the damaged strand
-DNA polymerase I (PolI) fills in the resulting gap.
d. DNA glycolases removes the damaged nitrogenous base.
-It leaves the sugar-phosphate backbone intact and thus creating an apurinic/apyrimidinic site, which is commonly referred to as an AP site.
e. Xeroderma pigmentosum complementation group A(XPA)
-This is an essential protein in the nucleotide excision repair pathway.
- It helps to make a pre-incision complex along with other proteins.
the answer your looking for :
A. genus and species
hope this helps!!
Answer:
The xylem is a vascular tissue responsible for the transportation of water from the root to other parts of the plant. While the phloem is responsible for the transportation of soluble organic nutrients gotten from photosynthesis, to other parts of the plant.
Explanation:
The xylem is a hollow tube made up of dead empty cells that continues throughout the whole length of the trunk of a plant. The cohesive (i.e water attracts water) and adhesive (i.e water attracts xylem) nature of water makes it possible for water to move from the root which is the major source of water transported, up to the topmost leaf of the plant in a process called capillarity. An upward pull, which keeps the upstream of water continuous is generated during transpiration (i.e the loss of water from the plant).
The phloem, which is also hollow in nature, transports glucose from photosynthetic regions of the plant, majorly the leaf, to other parts of the plant. This process is called translocation.
