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Nutka1998 [239]
2 years ago
6

RNA interference can be a mechanism of defense against viral infection as well as for regulation of gene expression. RNA interfe

rence can be a mechanism of defense against viral infection as well as for regulation of gene expression.
a. True
b. False
Biology
1 answer:
pishuonlain [190]2 years ago
5 0

Answer:

True

Explanation:

RNA interference is one of the cell's mechanism to regulate gene expression. Two classes of RNA, micro RNA (miRNA) and small interfering RNA (siRNA) are responsible for post transcriptional gene regulation. RNA interference can also help to fight against viral infection. They prevent the transcription of viral gene and in some cases also lead to its degradation by initiating attack from various protein complexes called as ribonucleases.  

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Answer:

The correct answer is "short RNA primers; Okazaki fragments".

Explanation:

The missing information of this question is as follows:

"Replication of the lagging strand of dna is accomplished by repeatedly making __________ followed by 1,000-2,000 nucleotide segments called __________"

The correct answer is "short RNA primers; Okazaki fragments".

DNA replication always occurs from 5' to the 3' end, in what is known as the directionality or the end-to-end chemical orientation in molecular biology. This fact makes difficult the synthesis of the lagging strand of DNA. In order to achieve this short RNA primers are bound to  segments of DNA (serving as the 5' end available for the DNA polymerase to synthesize), which leads to the discontinuous synthesis of Okazaki fragments that are later linked together by the enzyme DNA ligase.

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3 years ago
Imagine that you are using a microscope. Your high power objective 40x and your eyepiece is 15x. What is your total magnificatio
marin [14]
The total magnification would be 600x as you would obtain the total magnification by multiplying the objective lens magnification and the eyepiece magnification together.

40 • 15 = 600.
6 0
2 years ago
Read 2 more answers
Drawin's experiments are just one way to study phototroprism. A student wants to investigate the effects of phototroprsm in bean
oksano4ka [1.4K]

Answer:

Angle of light source

Explanation:

Independent variable is the variable that the experimenter changes or manipulates in an experiment in order to bring about a measurable response, which is the dependent variable.

In this question, a student wants to investigate the effects of phototropism in bean plants. She places a light source directly above one plant, at a forty-five degree angle to another, and at a ninety-degree angle from the third. This shows that the variable being manipulated (independent variable) is the ANGLE OF THE LIGHT SOURCE.

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