Questions And Answers
1/60 Questions
Which group of chemicals is not normally found in most living things?
Carbohydrates
Proteins
Silicates
Nucleic acid
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2.
What is the middle layer of the kidney?
Nephron
,Cortex
Renal Medulla
Renal Pelvis
Correct Answer
A. Renal Medulla
Explanation
The middle layer of the kidney is called the renal medulla. It is located between the outer layer called
the cortex and the innermost part called the pyramids. The medulla contains structures called renal
pyramids, which are responsible for collecting urine and transporting it to the renal pelvis. Additionally,
the medulla plays a crucial role in regulating the concentration of urine and maintaining the balance of
water and electrolytes in the body.
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3.
What is the outer layer of the kidney?
Medulla
Cortex
Nephron
,Pyramid
Correct Answer
A. Cortex
Explanation
The correct answer is cortex. The cortex is the outer layer of the kidney. It contains the glomeruli, which
are responsible for filtering the blood and producing urine. The cortex also contains the renal tubules,
which reabsorb nutrients and water from the filtrate. The medulla, on the other hand, is the inner part
of the kidney and contains the renal pyramids. The nephron is the functional unit of the kidney,
responsible for filtering and regulating the composition of urine. However, in this question, the outer
layer of the kidney is specifically being referred to, which is the cortex.
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4.
What are the components of the Gram-negative bacterial cell wall called?
Endotoxins
Exotoxins
Toxins
None of the above
, Correct Answer
A. Endotoxins
Explanation
Gram-negative bacterial cell walls contain lipopolysaccharides (LPS), which are known as endotoxins.
These endotoxins are released when the bacterial cell wall is damaged or destroyed, and they can cause
a strong immune response in the host organism. Exotoxins, on the other hand, are toxic substances
secreted by bacteria that can cause damage to the host even in the absence of the bacteria themselves.
Therefore, the correct answer is endotoxins.
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5.
What must proteins be changed to in order to be absorbed by cells?
Amino acids
Sucrose
Fatty acids
Glycerol
Correct Answer
A. Amino acids
Explanation
Proteins are large molecules made up of amino acids. In order for cells to absorb and utilize proteins,
they must be broken down into their individual amino acid components. This process is carried out by
enzymes in the digestive system. Once proteins are broken down into amino acids, they can be