Nine amino acids are needed to travel through the thickness of the membrane.
Alpha-axial helix's distance between amino acids is 1.5. A
The number of gaps between the 22 amino acids in the helix is equal to (22-1) = 21.
Therefore, the helix's length is (21 X 1.5) = 31.5.
One alpha helix is sufficient to span the membrane's breadth, hence the formula is: span of the helix = thickness of the membrane = 31.5 A
The thickness of the membrane is determined by the formula above to be 31.5 AA.
In the beta-strand, there is 3.5 AA between each amino acid.
Therefore, (31.5/3.5) = 9 amino acids are needed.
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Gypsy moths are consumers because they consume flower nectar and juice from rotten fruits.
Answer:
b) Operons for coordinated gene expression
Explanation:
Operon refers to a unit of genetic function and is mainly found in bacteria and phages. An operon consists of a promoter, an operator, and a coordinately regulated cluster of structural genes. The genes of an operon code for proteins or enzymes that mostly function in a common pathway. It allows a single promoter and operator or any other regulatory sequence to regulate the expression of functionally related genes.
For instance, lac operon consists of three structural genes that code for the enzymes involved in the catabolism of lactose sugar. The operon is expressed only when lactose is available in the medium. This pattern of gene regulation is not found in eukaryotes.
Answer:
Explanation:
Deciduous and Coniferous trees are both Woody plants and can both be found in the forest, but there are significant differences between them including-
1) The leaves of deciduous trees change color and are shed seasonally while the needles of Coniferous trees are not lost seasonally, neither do they turn pale
2) Deciduous trees are flowering plants and so they bear their seeds in fruits while Coniferous trees are gymnosperms and so bear their seeds in cones.
3) Coniferous trees possess needles in lieu of leaves while deciduous trees possess broad leaves
4) Examples of Coniferous trees are firs, junipers, redwoods, spruces, and pines etc. while examples of deciduous trees are oak, maple, and elm etc.
In 1665, Robert Hooke observed D. Cell Walls through a microscope!
