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frutty [35]
2 years ago
13

4. Name the dark, linear, thread-like structures that you can see in some of the onion root tip cells. What Biomolecule of hered

ity do they contain
Biology
1 answer:
mario62 [17]2 years ago
3 0
So dark linen thread structure is chromosome that we see. And and by molecule heritage that we contain.
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Drag each label to the correct location on the diagram.
algol13

Diagram found elsewhere attached

Answer:

Clockwise from bottom

3. formation of mRNA in the nucleus

6. secretion of hormone  by tissue

4. initiation of DNA  replication because  of a signal given  by the hormone

2. synthesis of protein  molecule by mRNA  and tRNA

1. secretion of protein  by the cell

5. binding of the  hormone molecule  with its receptor  of the cell

Explanation:

The tissue in the top left releases a hormone. For example, a steroid hormone such as estrogen, which can impact gene expression at the level of transcription. This hormone then travels to a different cell to carry out its function. The hormone is able to enter the cell and binds receptors which recognise it. In this case, these receptors are present in the nuclear envelope. When the hormone has bound the receptor, it initiates a signalling cascade that the cell responds to.

In this case, the effect of the signal from the hormone is to initiate DNA replication. This is a common effect of hormones such as growth factors that signal the cells to proliferate.

The initiation of the signalling can  also affect how genes are expressed. In this case, an mRNA is produced in the nucleus, which is created as a result of transcription. This mRNA molecule then moves to the cytoplasm, where it becomes translated into a polypeptide sequence at a ribosome, with the help from transfer RNAs (tRNAs).

This polypeptide forms a mature protein by progressive folding and potential modifications, and is released by the cell to perform its functions.

7 0
3 years ago
Which phases of matter have a variable volume
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Matter in the plasma state have a variable volume and shape.  Plasma contains ions and electrons , both of which can move around freely.
8 0
3 years ago
Please help me with these questions
Dvinal [7]
1.C


  

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8 0
3 years ago
¿que necesita una teoría para que sea valida?
AURORKA [14]

Answer:

la teoría debe ser la precisión de las predicciones que debe producir

8 0
3 years ago
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Where did the methylmercury come from?
Elena-2011 [213]

Answer:

Methylmercury is formed from inorganic mercury by the action of microbes

Explanation:

Hope this helps, have a great day.

7 0
3 years ago
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