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Nata [24]
2 years ago
11

Viruses cannot reproduce on their own and require a host organism to do it for them. This is one reason viruses are not consider

ed to be alive.
t or f
Biology
1 answer:
Studentka2010 [4]2 years ago
5 0

Answer: Yes, it is true

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Un ascensor recibe 1200 calorías y realiza 2200 joules de trabajo ¿Cómo se puede medir la energía interna del sistema?
bogdanovich [222]
Solución: El problema indica que se le están suministrando 700 calorías de calor, eso quiere decir que Delta Q será positivo, por otra parte nos dice que al sistema se le aplicará un trabajo de 900 Joules, aquí el signo de Delta W tendrá que ser negativo, puesto que se la están aplicando al sistema.

Sabiendo ese análisis podemos dar solución al problema de la siguiente forma:
3 0
3 years ago
Which of the following is not a characteristic of cancer cells?
julia-pushkina [17]

Answer:

B. They have a single small nucleus.

Explanation:

The presence of large nucleus is a characteristic feature of cells that frequently undergo cell division. Cancer cells are characterized by uncontrolled continuous cell division even when the new cells are not required by the body.

This leads to the formation of benign or metastatic tumors. To undergo continuous cell division, the cancer cells have a large nucleus. The nucleus of the cancer cells is mostly hyperchromatic and distinct due to higher nuclear to cytoplasmic ratio. It allows these cells to exhibit the uncontrolled cell division.

6 0
3 years ago
Are jellyfish heterotrophic or autotrophic?
Ludmilka [50]
A jellyfish is a heterotroph, it gets energy from eating, autotrophs produce their own energy
8 0
3 years ago
Read 2 more answers
Vegetable shortening is a food product rich in trans fatty acids. It is produced by converting several cis double bonds totransd
liraira [26]

Answer:

Partial hydrogenation

Explanation:

Vegetable oils naturally contain cis fatty acids. These fatty acids have double bonds and the two H atoms are on the same side of bond, producing a kink in  the structure.

Cis fatty acids are converted into trans fatty acids by the process of partial hydrogenation or vegetable shortening. Hydrogen is added to convert some of the double bonds into single bonds but all double bonds are not removed. However, the cis double bonds end up getting converted to trans double bonds. H atoms are now on the opposite sides of the double bond. This arrangement makes the kink disappear from the structure hence trans fat is structurally similar to saturated animal fat. It increases the longevity of fats and makes it solid at room temperature but also has many side effects like increasing bad LDL cholesterol in blood.

7 0
3 years ago
How many high-phosphoryl-transfer-potential molecules are required to synthesize phosphatidylethanolamine from ethanolamine and
valkas [14]

Answer: 3(three)

Explanation:

In the biosynthesis of phosphatidylethanolamine from ethanolamine and triglyceride, 3 high energy molecules are used in the first and second step.

The first steps occur in the cytosol, where ethanolamine is phosphorlated with ATP to give phosphoethanolamine and ADP by the enzyme ethanolamine kinases, and in the next reaction which is the rate-limiting step, phosphoethanolamine react with cytidine triphosphate (CTP) to form cytidine diphosphoethanolamine. In this reaction two molecules of phosphate group is given off.

The third step occurs in the endoplasmic reticulum CDP-ethanolamine react with diacylglycerol to form phosphatidylethanolamine.

The answer is Three high energy molecules. One molecule of ATP to form phosphorylethanolamine and two molecules of ATP to regenerate CTP from CMP.

8 0
3 years ago
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