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stiv31 [10]
3 years ago
11

Normal leukocytes use several protective mechanisms in combating disease-causing microbes such as bacteria. Which of the followi

ng is NOT a method related to substance uptake by a white blood cell? a. phagocytosis b. exocytosis c. receptor-mediated d. endocytosis e. pinocytosis
Biology
1 answer:
Anna11 [10]3 years ago
7 0

Answer:b; exocytosis

Explanation: leukocytes are amoeboid white blood cells, which are involved in immune response .such response included combating foreign bodies like micro organisms which invade the body.they do this by engulfing the micro organisms and digesting them.

Phagocytosis, pinocytosis, receptor mediated endocytosis are the ways in which the cells engulfs the Invaders.

In endocytosis,the membrane of the cell traps the organism by forming an invagination.it then encloses the micro organism and digests it.

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The nucleoside analogue acyclovir, which is used to treat herpes simplex virus (HSV) infections, lacks a 3′ hydroxyl group (–OH)
Dima020 [189]

Answer:

There won't be any functional viral DNA synthesis

Explanation:

First of all, you must consider that the HSV has a double-stranded, linear DNA genome. Furthermore, the DNA skeleton is made of the 5'-3' phosphodiester bond. In other words, the 5-phosphat of a nucleotide will bond the 3' OH of the Deoxyribose (see image).

Therefore, if you add a molecule which lacks the 3' OH, such as acyclovir, and has a similar chemical structure to a regular nucleotide, the DNA polimerase will be able to add acyclovir to the main backbone of the viral genome. All in all, you'd be ''cheating'' the DNA pol.

Hence, wherever acyclovir was integrated, there won't be any chance to form a 5'-3' phosphodiester bond. The protomolecule will not be stable and will soon be degradated.

6 0
3 years ago
Read the questions below. Check all of the scientific questions.
irga5000 [103]

Answer:

The  following are examples of scientific questions

      How fast do cheetahs run?

      Does adding fertilizer to the soil help plants grow faster?

      What do pelicans eat?

      Why are my neighbors going to the mall?

Explanation:

An essential part of science is asking questions.  

A good scientific question is that it can be  answered by direct observations or with scientific tools.

      How fast do cheetahs run?

      Does adding fertilizer to the soil help plants grow faster?

      What do pelicans eat?

      Why are my neighbors going to the mall?

Examples of questions that are not scientific  are based on values or opinions like what people believe is right or wrong, or beautiful or ugly.

      Do fish like living in aquariums?

      Does my dog like her bone better than her Frisbee?

3 0
3 years ago
In pea plants, wrinkled seeds are recessive to smooth seeds, and green seeds are recessive to yellow seeds. Assume a plant produ
avanturin [10]

The plant has the genotype ssyy. (Uncapitalized because they are recessive genes, not dominant.)

7 0
3 years ago
NEED HELP ASAP!!!!<br> Name one advantage of light microscopes<br> over electron microscopes.
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Answer:

The biggest advantage is that they have a higher resolution and are therefore also able of a higher magnification (up to 2 million times). Light microscopes can show a useful magnification only up to 1000-2000 times. This is a physical limit imposed by the wavelength of the light.

Explanation:

Hope I <em><u>Helped!</u></em> :D

3 0
3 years ago
Read 2 more answers
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ollegr [7]
Well I will assume you are talking about the bird soooo...
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