Answer:
Option (a) and (d).
Explanation:
The breaks in DNA molecule may occur due to replication error and oxidizing agent. The double-stranded breaks in DNA can be corrected by Homologous end joining and non homologous end joining.
Homologous end joining is used to repair the DNA present in G2 nad S phases of the cell cycle. The homologous sequences of DNA is used to repair the DNA. Non homologous end joining occurs in the cell present at G0 and G1 phase of the cell cycle. The DNA broken ends are juxtaposed and later rejoin together by DNA ligase.
Thus, the correct answer is option (a) and (d).
b. reproduction
c. mitosis
We find DNA on the chromosomes, in every living cell that an organism owns. So, the correct option is A.
The word chromosome comes from the Greek words for color (chroma) and body (soma). Chromosomes are so named because they are cell structures, or bodies, that are strongly stained by certain color dyes used in research.
Chromosomes are defined as structures found inside the nucleus of a cell that are organized into genes from proteins and DNA. Each cell normally has 23 pairs of chromosomes.
These are threadlike structures which are made of protein and a single molecule of DNA that serve to carry the genomic information from cell to cell.
Therefore, the correct option is A.
Learn more about Chromosomes, here:
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Answer:
A. Chromosomes
Explanation:
A Chromosome is some thing carrying genetic information in the form of genes.
Answer:
This methodology enables to measure simultaneously both the result and exposure in the group under study
Explanation:
A cross-sectional method is a type of scientific design based on observational data. The cross-sectional studies involve the use of diverse groups that differ in the variable investigated but share other features (for example, individuals with the same educational background, ethnicity, economic status, etc). This class of studies is generally used in developmental psychology.
of other organ systems in the human body.
Answer:
nervous system, skeletal system, muscular system, cardiovascular system, urinary system and respiratory system are just a few
Explanation:
Answer:
All systems with short explanation
Circulatory system / Cardiovascular system:
Circulates blood around the body via the heart, arteries and veins, delivering oxygen and nutrients to organs and cells and carrying their waste products away.
Keeps the body's temperature in a safe range.
Digestive system and Excretory system:
System to absorb nutrients and remove waste via the gastrointestinal tract, including the mouth, esophagus, stomach and intestines.
Eliminates waste from the body.
Endocrine system:
Influences the function of the body using hormones.
Integumentary system / Exocrine system:
Skin, hair, nails, sweat and other exocrine glands
Immune system and lymphatic system:
Defends the body against pathogens that may harm the body.
The system comprising a network of lymphatic vessels that carry a clear fluid called lymph.
Muscular system:
Enables the body to move using muscles.
Nervous system:
Collects and processes information from the senses via nerves and the brain and tells the muscles to contract to cause physical actions.
Renal system and Urinary system
The system where the kidneys filter blood to produce urine, and get rid of waste.
Reproductive system:
The reproductive organs required for the production of offspring.
Respiratory system:
Brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
Skeletal System:
Bones maintain the structure of the body and its organs.
The thyroid gland will be mostly affected in this case. The element Iodine is
the major precursor which is involved in the formation of two hormones.
When an individual is exposed to radioactive iodine , it alters the production
of the hormones which leads to series of effects such as:
Read more about Thyroid hormones herebrainly.com/question/2469666
Answer:
In the given case, the thyroid gland will be affected the most due to the exposure of the element iodine. For the synthesis of thyroid gland hormone, T3 and T4 iodine is required. As the exposure of the radioactive iodine element is taking place, therefore, it will result in the deterioration of the thyroid gland. Radioactive iodine is generally used in the treatment of hyperthyroidism.
However, in normal individuals, the exposure of the radioactive iodine element results in a decrease in the level of thyroid hormones below the normal level due to the destruction of the thyroid cells. The symptoms seen can be neck tenderness, swollen salivary gland, and loss in body weight.
proposing that the sun revolves around the earth
stating that the sun is the center of the solar system
tracking the movement of the planets and stars
Nicolaus Copernicus revolutionized astronomy by stating that the sun is the center of the solar system.
Answer:
Epigenetic mark
Explanation:
A methyl group attached to the nitrogenous base of one amino acid on the DNA is known to have effects on the expression and transcripcion of the genes, and this is also called epigenetic modifications. Therefore, an methyl group attached to the DNA is responsible for epigenetic modifications and so is an epigenetic mark.