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liq [111]
3 years ago
9

DNA ligase creates covalent bonds between the bases of the two pieces of DNA. True or False?

Biology
1 answer:
IrinaK [193]3 years ago
7 0
True i think if not sorry

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The heart is composed of 2 pumps. the right side pumps blood to ________ and the left side pumps blood to ______.
liraira [26]
Oxygen
Carbon dioxide
4 0
3 years ago
You have isolated a new mutation in the T4 bacteriophage rII A gene and you map its location within the gene by recombination fr
pantera1 [17]

Answer:

A lethal mutation, thereby the resulting phenotype is not observed .

Explanation:

Lethal mutations are the result of genomic changes that may be lethal in certain conditions. In genetic research, this type of mutation has shown to be very useful in analyzing gene function (i.e., genes whose protein products are key for the survival of the organism in question), and they are perfect gene markers. In bacteriophages, for example, temperature-sensitive mutants of phage T4 that can not grow at temperatures higher 42°C have been identified (Edgar & Lielausis 1964).

Citation:

R. S. Edgar, & I. Lielausis (1964). Temperature-sensitive mutants of bacteriophage T4D: their isolation and genetic characterization. Genetics, 49(4), 649.

5 0
3 years ago
The most important factor that determines the percent of oxygen saturation of hemoglobin is
erik [133]

Answer:

This question lacks options, options are:

a) The partial pressure of oxygen

b) Acidity

c) The partial pressure of carbon dioxide

d) Temperature

e) BPG

The correct answer is a. The most important factor that determines the percent of oxygen saturation of hemoglobin is <u>The partial pressure of oxygen </u>.

Explanation:

Hemoglobin is an oxygen transport protein. Partial Oxygen Pressure (PaO2), measures the pressure of dissolved oxygen in the blood, that is, it shows how well oxygen passes from the lungs into the bloodstream. A high partial pressure of oxygen in the blood produces an almost complete saturation of hemoglobin, which indicates the maximum amount of oxygen that combines, but when PaO2 is reduced, so is hemoglobin saturation, when saturation is below 90% hypoxemia occurs, that is, the level below normal blood oxygen levels.

3 0
3 years ago
Which substance is considered to be a proven ergogenic aid that increases athletic performance?
fenix001 [56]

Out of the following given choices;

<span>A.      </span>Salt tablets

<span>B.      </span>Bee pollen

<span>C.      </span>Carnitine

<span>D.      </span>Coenzyme Q10

<span>E.       </span>None of the above  

The answer is D. (none of the above). These elements are found  naturally in nature and in our bodies. Coenzyme Q-10 and carnitine are found naturally in our bodies while bee pollen and salt are found naturally in our environments. Therefore, it is implausible to consider them ergogenic substances






4 0
3 years ago
Read 2 more answers
As an infant, the ability to produce antibodies is
fiasKO [112]
A baby's immune system is not fully developed until he/she is about six months-old. In the meantime, pregnant mothers pass immunoglobulin antibodies from their bloodstream, through the placenta, and to the fetus. These antibodies are an essential part of the fetus's immune system. They identify and bind to harmful substances, such as bacteria, viruses, and fungi that enter the body. This triggers other immune cells to destroy the foreign substance.
4 0
3 years ago
Read 2 more answers
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