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blondinia [14]
3 years ago
14

Which of the following statements is not true about mRNA?

Biology
1 answer:
ASHA 777 [7]3 years ago
3 0

Answer:

The correct answer is d. eukaryotes almost always produce polycistronic mRNA

Explanation:

mRNA can be polycistronic or monocistronic. A monocistronic mRNA contains the information of one gene only so a monocistronic mRNA code only one protein at a time but a polycistronic mRNA can code for multiple proteins at a time.

In eukaryotes, one transcriptional unit carries the information of only one protein so eukaryotes produce monocistronic mRNA but some eukaryotes are capable of having polycistronic mRNA.

In prokaryotes, many genes are transcribed as a unit to produce multiple proteins so prokaryotes produce polycistronic mRNA. Therefore the statement which is not true is d. eukaryotes almost always produce polycistronic mRNA.

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Chloride ions, Cl-, follow actively transported Na+ ions from the nephrons into the blood. Would you not expect the Cl- concentr
DerKrebs [107]

Answer:

Bicarbonate ion, HCO3- (which has a similar charge to chloride ions) also follow sodium ions into the blood. Also, potassium ions, K+ are transported into the nephron so some chloride ions and bicarbonate ions remains in the nephron to balance the charge.

Explanation:

Sodium is the primary positively charged electrolyte in extracellular fluid. Most of the solute reabsorbed in the proximal tubule is in the form of sodium bicarbonate and sodium chloride. Water is also reabsorbed in order to balance osmotic pressure

When sodium ions are reabsorbed into the blood, few of the substances that are transported with Na+ on the membrane facing the lumen of the tubules include Cl- ions, Ca2+ ions, amino acids, and glucose. Sodium is actively exchanged for K+ using ATP on the basal membrane.

In the distal convoluted tubule, K+ and H+ ions are selectively secreted into the filtrate, while Na+, Cl-, and HCO3- ions are reabsorbed to maintain pH and electrolyte balance in the blood.

Some chloride ions remains in the nephron to balance the charge of the secreted K+ ions and also due to the bicarbonate ions that are removed.

5 0
2 years ago
Prolonged use of lithium to treat bipolar disorder can cause damage to the kidneys such that epithelial cells of the collecting
rusak2 [61]

Answer:

E. glucosuria (glucose in the urine)

Explanation:

Generally, glycosuria occurs in patients with kidney changes due to diseases such as Wilson's disease or cystinosis, can also be a hereditary problem, but is not expected in patients with kidney damage caused by prolonged lithium use.

Normally, the kidneys filter the blood, eliminating all substances that are not necessary for the body to function, while glucose is reabsorbed in the blood because of its importance in energy production, but people with renal glycosuria do not reabsorb glucose. , which causes it to be eliminated in the urine, occurring glucosuria.

7 0
3 years ago
Wjat is a Shipping and packinging center mean
Elanso [62]

Answer:

Fulfillment center: Location where a product is packaged and made ready for delivery.

 

High-value shipping:  See the FedEx Service Guide for more information on declared value maximum liability.  

 

Insulated shipping: Packaging used to ship temperature-sensitive products, like food, to deliver product freshness. For more information, refer to the FedEx perishable shipping page.  

 

Label:  Every package has at least one label that provides useful information regarding the product, like how to use and/or transportation directions. Here are our recommendations for using custom labels to market your business.

 

Lead time: The time it takes for a package to arrive from point A to point B. For example: the time from a customer placing an order, to the arrival of that order at the customer’s doorstep. This includes order processing, manufacturing, and shipping time. Our shipping service portals can help lead you to specific transit

5 0
3 years ago
Which two factors have likely influenced global temperatures the most?
Alex787 [66]

Answer:

B: volcanic activity

D: fossil fuel consumption

Explanation:

Fossil fuel consumption and volcanic activity are the two factors that has a great influenced on the global temperatures. Fossil fuel consumption is a human activity and volcanic activity both releases carbondioxide gas while burning. This carbondioxide gas is a greenhouse gas which block the reflected solar radiation and leads to increase in the surface temperature of the earth.

5 0
2 years ago
1. How does the ozone layer over the Arctic change with the seasons?
alukav5142 [94]

Answer: d or c

Explanation:

5 0
3 years ago
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