Which is the best overall measure of kidney function, and what is the function of the p53 gene?

Here are the answers to your questions:

Question 7:
The most common test used to evaluate renal function is serum creatinine, which is then often used to calculate the Glomerular Filtration Rate (GFR). However, GFR itself is considered the best overall measure of kidney function. Since GFR is the direct measure of the kidney's filtering capacity, it is the most common evaluation of renal function.

The correct option is a.

• a) Glomerular filtration rate (GFR): This is the best indicator of overall kidney function, measuring how much blood the kidneys filter per minute. It is often estimated from serum creatinine levels.
• b) Urinalysis: Examines urine for abnormalities, which can indicate kidney issues but doesn't directly measure function.
• c) Blood urea nitrogen (BUN): Measures a waste product, but its levels can be affected by factors other than kidney function.
• d) Serum creatinine: A waste product whose blood levels are used to estimate GFR, making it a crucial component, but GFR is the ultimate measure of function.

The most common test used to evaluate renal function is a) Glomerular filtration rate (GFR).

Question 8:
The p53 gene (also known as TP53) is a tumor suppressor gene that plays a critical role in preventing cancer. It is involved in cell cycle control, DNA repair, and programmed cell death (apoptosis). Mutations in the p53 gene are found in a very high percentage of human cancers, making it the most frequently mutated gene in cancer.

The correct option is a.

• a) P53: This gene is famously known as "the guardian of the genome" due to its role in preventing tumor formation. Mutations in p53 are found in over 50% of all human cancers.
• b) P54, c) P60, d) P56: These are not recognized as the most frequently mutated genes in cancer.

The most mutated gene in people with cancer is a) P53.