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nadya68 [22]
3 years ago
7

How do some cells become brain cells and others become skin cells, when the DNA in ALL the cells is exactly the same. In other w

ords, if the instructions are exactly the same, how does one cell become a brain cell and another a skin cell?
Biology
1 answer:
serg [7]3 years ago
8 0

This occurs through the process of cell specialization, where in some cells genes are active whereas in others they are not.

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Given the mRNA sequence below, what would tRNA anticodons be in response? A-U-G-C-C-U-A-C-G-G-G-G-G-C-C-A
Lesechka [4]

Answer:

U-A-C-G-G-A-U-G-C--C-C-C-C-G-G-U

Explanation:

The mRNA (messenger RNA) is produced via the process of TRANSCRIPTION, which is the first stage of gene expression in living cells. The mRNA sequence formed is further read in the ribosomes in a group of three nucleotides called CODONS. This reading is done by another type of RNA called transfer RNA (tRNA).

The tRNA uses a set of three nucleotide bases that are complementary to that of the mRNA codons called ANTICODON. The anticodons are complementary to the mRNA codon i.e. A on the mRNA sequence will be read and recognized by U on the tRNA anticodon.

Hence, given the mRNA sequence: A-U-G-C-C-U-A-C-G-G-G-G-G-C-C-A, the tRNA anticodons that will read this sequence will be: U-A-C-G-G-A-U-G-C--C-C-C-C-G-G-U

8 0
3 years ago
A hybrid _____.
Serhud [2]

Answer: is heterozygous

Explanation: A hybrid is heterozygous which means that it has one dominant gene and one recessive gene. A dominant gene is a type of gene which has the ability to express itself phenotypically either in a homozygous or a heterozygous state. A dominant gene masks the effect of a recessive gene. A recessive gene is a type of gene that lacks the ability to express itself in a heterozygous state. It can only express itself outwardly in a homozygous state. It's effect is masked by the dominant gene is a heterozygous state.

3 0
3 years ago
why is it impossible for hikers camping near the top of a 14000 foot peak to get a really hot cup if coffee
Law Incorporation [45]
Because the oxygen level is lower
3 0
3 years ago
What factors limit the size of a cell?
vesna_86 [32]

Answer:

Cell size is limited by a cell's surface area to volume ratio. A smaller cell is more effective and transporting materials, including waste products, than a larger cell. Cells come in many different shapes. A cell's function is determined, in part, by its shape.

Explanation:

I hope this helps you!

5 0
3 years ago
Read 2 more answers
Do black worms use binary fission or budding
Nikolay [14]
Budding, I believe.
8 0
3 years ago
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