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Tanzania [10]
3 years ago
11

Which type of RNA interacts with nuclear proteins to form a ribonucleoprotein complex responsible for intron removal? a) snRNA b

) siRNA c) rRNA d) miRNA.
Biology
1 answer:
Gennadij [26K]3 years ago
4 0

Answer:

a) snRNA

Explanation:

The association of small nuclear RNA  (snRNA) and some specific proteins forms small nuclear ribonucleoprotein complexes.  Some complexes are spliceosomes,  molecular machines -made up of a snRNA and about 80 proteins- that remove introns from pre-mRNAs via successive phosphoryl transfer reactions.

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When is selective breeding okay and when is it not? Provide evidence.
jonny [76]

Answer:

Farmers have been using selective breeding for improving their crop qualities and producing animals with better characteristics.

improved so that mankind can benefit from it.

Selective breeding is not okay on a bigger level where it might eradicate the natural varieties of plants and animals completely.  When done on a larger level, the wild-type traits of plants and animals will change and be removed completely. This will lead to lesser genetic diversity.

5 0
3 years ago
Compare the adult frog to the tadpole.
KatRina [158]
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3 years ago
A researcher synthesizes a new molecule called inhibitor X that inhibits the activity of phosphofructokinase (PFK), the enzyme t
Oduvanchick [21]

Answer : The dissociation constant of the PFK‑inhibitor complex is, 5 µM

Explanation :

The expression for reversible competitive inhibition when apparent Km affected by addition of the inhibitor is:

K_m_a=K_m[1+\frac{I}{K_i}]

where,

K_m_a = apparent value = 52 µM

K_m = Michaelis–Menten constant = 40 µM

I = inhibitor concentration = 1.5 µM

K_i = dissociation constant of the PFK‑inhibitor complex

Now put all the given values in the above formula, we get:

52\mu M=40\mu M[1+\frac{1.5\mu M}{K_i}]

K_i=5\mu M

Therefore, the dissociation constant of the PFK‑inhibitor complex is, 5 µM

7 0
3 years ago
When listing the levels of organization in organisms from least complex to most complex, which level is just below
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Answer:

Organelle (oppitional, I don't put this on my paper but you can if you want), cells, tissues,  

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Phylogenetic trees ________.
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B is the correct answer. They can sometimes show an extinction but not always.

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