Answer:
Threonine has two chiral centers.
The correct options are c. carbon b and d. carbon c
Explanation:
Chiral centers are those that have four different groups of atoms bonded to it. Carbon a has three atoms of hydrogen attached to it so it can't be a chiral carbon. It isn't the carboxyl carbon either since it is double bonded to oxygen. And the amino nitrogen does not qualify anyway because it is bonded to three different groups of atoms, not four.
Explanation: we will conclude this by the following characteristics:
1.organims that lack a proper nucleus.
2.they have membrane bounded organelles
3.they are tiny single cell oraganisms which cannot be seen by naked eye.
4.they are the oldest livinh organisms on earth
5.they are present in very harsh conditions like volcanic vents or at the bottom of the sea
<span>John could make some simple changes to his breakfast to increase his fiber intake. Instead of orange juice, he could drink juice with added fiber such as V8 juice or fiber added grape juice. Instead of corn flakes, he could eat a high fiber cereal such as Grape Nuts. Instead of white toast, he could eat a slice of high fiber whole wheat bread. He can make some simple substitutions that will really impact his diet and his health.</span>
