Answer:
A. True. If the delivery of prospective lysosomal proteins
from the trans Golgi network to the late endosomes
were blocked, lysosomal proteins would be
secreted by the constitutive secretion pathway.
B. False. Lysosomes digest only substances that have been
taken up by cells by endocytosis.
C. False. N-linked sugar chains are found on glycoproteins
that face the cell surface, as well as on
glycoproteins that face the lumen of the ER, trans
Golgi network, and mitochondria.
Explanation:
A. Lysosomal proteins are carried through the indirect constitutive secretion pathway that transports lysosomal proteins from the TGN to plasma membrane and delivers to the late endosomes and the lysosomes.
B. Lysomes digest cellular components and materials by both endocytosis and autolysis.
- Autolysis is a self-destructive pathway by the action of enzymes in the lysosomes.
- Endocytosis is a receptor-mediated pathway and lysosomes digests substances that have been taken up or attached by specific receptors.
- Phagocytosis, an endocytosis pathway, involves ingestion of macromolecules, degraded cellular material, cellular debris, and decayed microbial cells
.
C. N-linked sugar chains are not present on the lumen of the mitochondria because mitochondria does not involve in vesicular transport.
N-linked glycosylation occurs by the action of the enzymes are present in the lumen of ER and golgi cisternae of the TGN and the sugars get attached to the glycoproteins on their lumen.
The 2015-2020 Dietary Guidelines for Americans advise that you ) keep your intake of cholesterol to no more than 10% of total Calories. Thus, option "B" is correct.
<h3>What are the dietary guidelines for Americans?</h3>
According to the dietary guidelines for Americans total fat intake should not exceed 35% of the total calories and the saturated fat intake should be limited to 10 % only.
The amount of carbohydrates, fats and proteins is allotted in case of the total energy that is obtained from the food that we eat.
More than the required amount of fat and saturated fat in the body can cause cardiovascular diseases.
Thus, option "B" is correct.
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Answer:
option c. Urea
Explanation:
Composition of normal urine is mostly water salts and other chemicals like uric acid, etc. about 95% of water is present in urine
Urea is one of the component produced in the metabolical activities of amino acid as the waste product of nitrogenous substances substance that is produced by amino acid metabolism.
Significant band high amount of urea in urine is an indicates that the kidneys are not functioning well or are an indication of Kidney failures and implies impairment in glomerular filtration.
1. sent to destroy bone. 2. bone is broken down 3. lay new bone 4. bone mineralized