Alcohol works as a central nervous system depressant by <span>binding to neuron receptors.
</span>Alcohol<span> can </span>affect badly on many<span> parts of the brain, it can contracts brain tissues and destroys brain cells, it also depresses the </span>central nervous system, so Alcohol is bad for health but instead of this people drink Alcohol a lot and when a person drink alcohol in excess amount<span> over a prolonged period of time that can cause serious problems with cognition and memory.</span>
As materials move from higher to lower concentration diffusion is occurring.
Melting temperature of RNA duplex will be higher
Explanation:
- RNA is a double stranded RNA with two complementary sequences
- Duplex DNA is simply double stranded DNA
- It is known A=U base pairs of duplex RNA is less stable than that of A=T base pairs of duplex DNA
- RNA duplexes are considered to be more stable than DNA duplexes of comparable sequences but physical basis for thermal stability is not much known hence melting temperature of RNA duplex will be higher
Answer: B) Arginine
Explanation: Having the sequence (mRNA):
5′-GUUUCCCGUAUACAUGCGUGCCGGGGGC-3, we can go through the following procedure:
1. Identifying the binding site for the initiator tRNA, which is the so-called "start codon" AUG: 5′-GUUUCCCGUAUAC<u><em>AUG</em></u>CGUGCCGGGGGC-3′
2. Look for the next codon after AUG, which is CGU:
5′-GUUUCCCGUAUACAUG<u><em>CGU</em></u>GCCGGGGGC-3
3. Look in a codon table in which amino acid corresponds to CGU. Then you will find that amino acid is Arginine.
The reason you should follow the above procedure is that during translation, ribosomes are in charge of creating a new peptide bond from mRNA using different tRNA. A tRNA is a structure with a codon attached to it and an amino acid. If a tRNA has a UAC codon attached to it, then this tRNA is going to scan the mRNA looking for the corresponding AUG (the so-called start codon). This is why the tRNA with the UAC codon attached to it is called "initiator tRNA". When initiator tRNA finds the start codon, the large subunit of the ribosome would place this tRNA plus mRNA in its so-called P site (Polypeptide site). On the right of the P site is the A site (Amino acid site) which will be waiting for the tRNA which attached codon corresponds to the next codon after the start codon AUG in the mRNA. For this case, that codon which A site is waiting for is CGU, which is attached to a tRNA containing the corresponding amino acid which is Arginine.
