Answer:
1. The substition that least affect on the enzymatic activity would be (arginine) because lysine is( positively) charged at physiological ph.
The substitution that have effect most on the enzymatic activity would be (Glu) because it is (negatively) charged at physiological pH.
Explanation:
Fill In The Blank. In three separate site-directed mutagenesis experiments, scientists altered a Lys residue in corn PEP carboxylase to an Asn, Glu, or Arg. The substitution that you would expect to have the least effect on enzymatic activity would be ARGININE because it, like Lys, is POSITIVELY charged at physiological pH. The substitution that you would expect to have the most effect on enzymatic activity would be GLU because it is NEGATIVELY charged at physiological pH. (Use structure tables if you need to.)
Answer:
D. norepinephrine- botulism
Explanation:
Botulism does not effect the neurotransmitter 'norepinephrine'. Rather, botulism occurs due to toxic consequences on the neurotransmitter 'acetylcholine'. Acetylcholine is produced by the motor neurons so that the muscles can operate properly. Botulism blocks the discharge of this neurotransmitter, acetylcholine, not the neurotransmitter, 'norepinephrine'.
Botulism occurs due to the production of a very harmful neurotoxin, Botulinum, which is made by the bacteria. The inhibition of acetylcholine which occurs due to this harmful toxin causes paralysis.
Based on the graphs, the environment must have favoured, by natural selection, the birds with larger beaks because the species of birds have evolved to have larger beaks.
The eradication of insects by disease must have cause starvation to the small-beaked birds hence causing their demise. In addition, the insects no longer compete for fruits with the large-beaked birds. The plentiful fruits lead to the growth of large beaked birds in the population.
Explanation:
Natural selection fits a population with its environment by favouring individuals with advantageous traits. These individuals outcompete the others for resources and stand greater chances for reaching maturity and passing down their genes to the subsequent generation. This is how species evolve with enviromental changes.
Learn More:
For more on natural selection check out;
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Amnesia is the loss of all memory of an event of a situation. Other things that also involve loss of memory are short term memory loss, or long term memory loss
the density decreases faster than the temperature decreases