Select the correct sequence for mineral uptake in plants.a. The root cells will initially uptake the minerals.b. The upwards movement of water will carry the minerals towards the leaves.c. Some of the minerals are deposited in the leaf cells.d. The minerals move into the xylem of the vascular tissue.e. Some of the minerals leave the xylem and enter the various tissues that require them.
A. d - b - e - a - c
B. d - b - c - a - e
C. c- a - d - b - e
D. a - b - d - e - c
E. a - d - b - e - c
Answer: E
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An egg of the organism of S. mansoni is isolated from the feces of an adult man who has been traveling in Africa. An unoperculated egg with a large lateral spine is recovered. The patient is administered the standard dose of praziquantel; however, his infection does not improve. Which one of the following statements explains this discrepancy?
a. Metrifonate should have been adminis-tered. b. Bilarcil is the drug of choice for this type of infection. c. Steroids should have been initially admi-nistered. d. A larger dose may be required to be effec-tive against this organism.
How do cholinesterase inhibitors improve the learning and memory of people who are suffering from Alzheimer's Disease?
A. Cholinesterase inhibitors will decrease the levels of acetylcholine in the brain. This will increase the neural functioning in brain regions associated with learning and memory. B. Cholinesterase inhibitors will increase the levels of testosterone in the brain. This will increase the neural functioning in brain regions associated with learning and memory. C. Cholinesterase inhibitors will decrease the levels of cerebral spinal fluid in the brain. This will decrease neural pressure associated with the brain regions associated with learning and memory. D. Cholinesterase inhibitors will increase the levels of acetylcholine in the brain. This will increase the neural functioning in brain regions associated with learning and memory.
Radioactive amino acid-labeled proteins in pancreatic acinar cells were located progressively in
a. secretory vesicles ?Golgi apparatus ?rough ER ?nucleus. b. Golgi apparatus ?rough ER ?nucleus ?secretory vesicles. c. rough ER ?Golgi apparatus ?secretory vesicles. d. rough ER ?secretory vesicles ?Golgi apparatus.
Which molecule is composed of a chain of amino acids?
A) carbohydrate B) lipid C) protein D) nucleic acid