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Ludmilka [50]
3 years ago
8

A 5' cap is not added to ribosomal RNAs or transfer RNAs because they Group of answer choices do not contain any guanine. are no

t transported out of the nucleus. do not bind the small ribosomal subunit. are not methylated. are not spliced.
Biology
1 answer:
Svet_ta [14]3 years ago
7 0

Answer:

do not bind the small ribosomal subunit.  

Explanation:

5' CAP is a structure present only in the mRNA molecule. It is characterized as a "helmet" added to the 5' end of the mRNA molecule.

The main function of 5' CAP is to protect mRNA in the cytoplasm (when it leaves the nucleus towards the ribosome). This is because in the cytoplasm can be found the enzymes ribonucleases and fostases that can alter the function of proteins that allow the mRNA to bind to the smaller subunit of the ribosome.

Since tRNA and rRNA do not need to be linked to the ribosome, they do not need the presence of 5' CAP in their compositions.

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Which statement is true about DNA?
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B

Explanation:

Both of the original DNA strands act as templates during replication. This option is correct.

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The observations of Hooke and van Leeuwenhoek documenting the existence of microscopic cells formed the basis of what important
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A. the cell theory stating that all living things are composed of cells.

Hope this helps!

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Signal molecules that travel through the vascular tissue to target cells where they have their effect
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Where they have there effect on the tissues cells

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Two autosomal genes, J and K, are 60 map units apart. You perform the following testcross: J K / j k x j k / j k. At what freque
Dmitry [639]

Answer:

  • J K / j k = 20%
  • j k / j k = 20%
  • J k / j k = 30%
  • j K / j k = 30%                

Explanation:

To calculate the recombination frequency, we have to know that 1% of recombinations = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

The map unit is the distance between the pair of genes for which every 100 meiotic products, one of them results in a recombinant one.

So, en the exposed example:

  • J and K are autosomal genes
  • J and K are separated by 60 M.U.
  • 60 M.U. means that there is 60% of recombination.

Cross)             J K / j k                    x                  j k / j k

Gametes) JK  Parental                                     jk, jk, jk, jk

                jk   Parental                                  

                Jk   Recombinant                          

                 jK   Recombinant

One map unit equals 1% of recombination frequency. This means that every 100 meiotic products, one of them is a recombinant one.

1 M.U. -------------- 1% recombination

60 M.U. ------------ 60% recombination

                              30% Jk  +  30% jK

100 M.U. - 60 M.U. = 40 M.U.

40M.U.--------------40 % Parental (Not recombinant)

                            20% JK   +   20% jk

Punnet Square)           JK       jk      Jk      jK

                          jk     JK/jk   jk/jk   Jk/jk   jK/jk

J K / j k = 20%

j k / j k = 20%

J k / j k = 30%

j K / j k = 30%                                

3 0
3 years ago
What is the name of this chemical reaction?
maxonik [38]
The answer is c
Reason: that’s what happens when the hit hits plants. That’s how they eat
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