Answer:
a. The letters Na with one dot
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such determines or defines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valency can be defined as a measure of the combining power of a chemical element with other atoms to form a molecule or chemical compound.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Thus, valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others.
Sodium is a chemical element that is found in group (1) of the periodic table and as such it has 1 electrons in its outermost shell. Also, the chemical symbol for Sodium is Na and it has one (1) valence electron.
A Lewis structure can be defined as a structural representation of an atom or molecule by using a dot to show the position and distribution of electron(s) around the atom or molecule.
Hence, the letters Na with one (1) dot is a correct Lewis structure diagram for Sodium (Na) because it has just one (1) valence electron in outermost shell.
For example, the Lewis structure diagram for Sodium (Na) is •Na.
Answer:
co2
Explanation:
co2 is the start of the cycle and it goes through the cycles to be extracted and added to the sugar.
The DNA microarray is a technology that is used to identify whether a specific person's DNA has mutations in genes like BRCA1 and BRCA2 which cause cancer.
- Therefore, a microarray assesses the quantity of mRNA transcripts in a sample, A genome-wide perspective of gene expression in cancer can be obtained since thousands of gene fragments can be found on an array.
- The idea behind microarrays is that sequences that are complimentary to one another will bind to one another.
- Restrictions endonucleases fragment the unidentified DNA molecules, which are then labeled with fluorescent dyes.
- These are then given a chance to interact with DNA chip probes.
- Chemotherapy has a positive effect on one group while having a negative effect on the other.
- Gene-expression microarrays have shown that the two groups' gene-expression patterns differ.
learn more about DNA microarray here: brainly.com/question/14545749
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The two main variables in an experiment are the independent and dependent variable.
An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.
A dependent variable is the variable being tested and measured in a scientific experiment.
The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.
For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light. The brightness of the light is controlled by the scientist. This would be the independent variable. How the moth reacts to the different light levels (distance to light source) would be the dependent variable.
When results are plotted in graphs, the convention is to use the independent variable as the x-axis and the dependent variable as the y-axis.
Answer:
The aminoacyl Trp tRNA would not be produced.
Explanation:
Aminoacyl tRNA synthetase is the enzyme which bonds aminoacids to tRNA by binding the tRNA bindng site. This bond requires energy from cleavage of ATP which is very unstable and it can release amino acid at the ribosome easily.
As a mutation in the trp aminoacyl trna synthetase occurs resulting in eliminatio of tRNA binding site, the aminoacyl TRP tRNA would not be produced.