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den301095 [7]
3 years ago
11

Researchers about the H.M.S Challenger discovered over 4000 new species of marine life T or F?

Biology
2 answers:
Over [174]3 years ago
6 0

I believe it's true if I'm right


asambeis [7]3 years ago
3 0

Answer:

true

Explanation:

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Neurons are not connected but pass signals to each other through the synapse.
TEA [102]
This statement is true. Neurons are not connected but they pass signals to each other through the synapse. The dendrites of the neurons are covered with synapses that allows them to send signals towards the next axon ahead of them.
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3 years ago
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What are ejcs? Describe the importance of the ejc complexes for the export and stability of mrnas.
Alex Ar [27]

Explanation:

The Exon Junction Complex (EJC) is a eukaryotic molecular machine that interacts with spliced mRNA upstream of exon-exon junctions, providing a binding platform for other trans-acting proteins that determine the fate of the mRNA.  The spliceosome deposits the ~335kD EJC in a non-sequence specific manner 20-24 nucleotides upstream of an exon-junction.  Functionally, the EJC aids in nuclear export of spliced mRNAs, assists in nonsense-mediated decay of incorrectly spliced mRNAs containing premature stop codons, and enhances translation efficiency.

Pre-mRNA bound by a spliceosome is usually not exported from the nucleus, so as to make sure that only fully-processed mRNA travels to the cytoplasm to be translated.  A protein called the mRNP exporter binds to the EJC, both through RNA interactions and interactions with the EJC-associated protein REF (RNA export factor) to help pre-mRNA exit the nuclear pore complex.

Interestingly, the efficiency of unspliced mRNA export is dependent on the length; longer mRNAs are exported more efficiently than shorter mRNAs. In spliced mRNAs, however, once the 5' exon is long enough to bind the EJC, the length of the spliced mRNA does not affect the export efficiency.

There are a certain number of EJCs in a cell, and they must be recycled in order to continue tagging mature mRNAs. Once in the cytoplasm, the ribosome-associated regulator protein (PYM) acts as a dissociation factor.

5 0
3 years ago
What type of bond is formed when oxygen combines with hydrogen to form water​
Vadim26 [7]

Answer:

water is a covalent compound consisting of hydrogen and oxygen . it contains Single covalent bond

5 0
3 years ago
My grades CLOSE tomorrow helpppppp
SOVA2 [1]

Answer:

Like mouse poison i guess PFFFT

Explanation:

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3 years ago
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For the following three cultures, using any resource find out if they are obligate aerobes, facultative anaerobe, or obligate an
Dima020 [189]

Answer:

<em>Escherichia coli </em>- Facultative anaerobe

<em>Micrococcus luteus </em>- Obligate aerobe

<em>Clostridium sporogenes</em> - Obligate anaerobe

Explanation:

In simple terms, obligate aerobes are organisms that require oxygen to grow and metabolize molecules such as fats and sugars to produce energy. Many animals fall under this category. Other examples are <em>Mycobacterium tuberculosis </em>and <em>Micrococcus luteus</em>.

Facultative anaerobes are organisms (usually bacteria) that can grow both in the presence and absence of oxygen. The most example of this are the <em>Escherichia coli</em><em>.</em>

Obligate anaerobes are organisms (usually microorganisms) that cannot survive when exposed to normal atmospheric concentration of oxygen. Examples are <em>Clostridium sporogenes</em><em> </em>and <em>Clostridium botulinum.</em>

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3 years ago
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