I just wanted to clarify anwsers.
Question
23. Nucleotides contain phosphate groups bonded to the..
A) C3' or c5' atoms
B). C3 or C3' atoms
C). N1 or N9 Atoms
D). C3 or N9 atoms
E). C3 or C5 atoms
The anwser that I chosen in A.
QUESTION 19. When the hydrogen ion concentration of a solution increases,
A). The hydroxide ion concentration increases and the pH increases
B). The hydroxide ion concentration decreases and the pH increases.
C). The hydroxide ion concentration decreases and the pH decreases
D). The hydroxide ion concentration increases and the pH decreases.
I picked B?
To clarify the answers you have chosen for both questions:
Question 23: The correct answer is E) C3 or C5 atoms.
To understand why this is the correct answer, we need to know that a nucleotide is composed of three parts: a phosphate group, a sugar molecule (deoxyribose or ribose), and a nitrogenous base (adenine, thymine, cytosine, or guanine).
In a nucleotide, the phosphate group can be bonded either to the C3 atom or the C5 atom of the sugar molecule. Therefore, the correct answer is E) C3 or C5 atoms.
Question 19: The correct answer is D) The hydroxide ion concentration increases and the pH decreases.
To understand why this is the correct answer, we need to know about pH and how it relates to the concentration of hydrogen ions (H+) and hydroxide ions (OH-) in a solution.
When the hydrogen ion concentration (H+) increases in a solution, it means that more acidic hydrogen ions are present. This leads to a decrease in the concentration of hydroxide ions (OH-).
The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution. As the hydrogen ion concentration increases, the pH decreases. So, the correct answer is D) The hydroxide ion concentration increases and the pH decreases.
Remember, understanding the concepts behind the questions is crucial for accurately answering them.