The meninges would be found within which body cavity? a. pelvic cavity e. Abdomi

Question

The meninges would be found within which body cavity?

a. pelvic cavity

e. Abdominopelvic cavity

The monomer unit of a protein contains

In DNA, a guanine base will form a hydrogen bond with

Which of the following characteristics is associated with malignant melanoma?

Which might be due to a decrease in the amount of oxygen in the blood?

What is inflammation of one or more costal cartilage called?

a. Cartilaginous distension

b. Otitis

c. Arthritis

d. Intercostal space distension

e. Costochondritis

Explanation / Answer

1. Meninges are found in the vertebral and cranial cavity. Meninges are the protective layers of the brain and they are continuous in the spinal cord. There are 3 meninges namely outer most layer called Duramater, middle layer called the Arachnoid mater and the inner most layer called the piamater.

2. Monomer is the structural unit of a protein. All the monomers are put together to form a polymer and the polymers together form a protein. Monomer is nothing but the amino acid and all the amino acids have the structure in common with slight difference in the side chain attached to the carbon atom. Monomer contains a carbon atom, an amino group that is NH2 group, a carboxylic group, a hydrogen atom and a side chain called R group. So answer is all of the above

3. In DNA the guanine base will form a bond with cytosine group. DNA consists of purine and pyramid in groups. Purines include adenine, guanine and pyramidines include cytosine and thymine. A purine adenine forms a bond with pyramidines thymine and a purine guanine forms a bond with pyramidine cytosine.

4. Melanoma is the one among the cancers. It is a skin cancer. Cancer occurs due to rapid or unusual cell growth resulting from several mitotic divisions. Melanoma occurs in the melanocytes of the skin responsible for the pigmentation of skin. It occurs due to Mutation of DNA sequence when exposed to harmful Ultraviolet rays from the direct sunlight. Characteristics include asymmetrical moles, border, change in skin color, diameter greater than pencil eraser. So answer is all the above.

5. Decrease in the amount of oxygen causes cyanosis. It is a condition in which the oxygen levels are low and hence blood is deprived of sufficient oxygen causing bluish tinge in some parts of the body like lips, skin etc.

6. Costal cartilage is the one which joins the ribs to the sternum or breast bone. So the inflammation or the swelling of this cartilage is called costochondritis. This is also known as chest wall pain.

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