Pick the BEST answer:
A)Which Of The Following Is An "Excitable Cell"?
<4>1) Neuron
<3>2) Electron
<4>3) Hormone
<3>4) Both 1 & 2
<4>5) All Of The Above
B)What Is The Popular Molecule That Energizes Many Activities In Cells?
<4>1) Adenosine Triphosphate
<3>2) Adenosine Diphosphate
<4>3) Deoxyribose Nucleic Acid
<3>4) Ribose Nucleic Acid
<4>5) H2O
C)Which Of The Followings Has The Correct Complementary Base Pairing In DNA?
<4>1) Purines - Purines
<3>2) Purines - Pyrimidines
<4>3) Pyrimidines - Pyrimidines
<3>4) A-U & C-G
<4>5) A-C & G-U
D) Which Of The Followings Is TRUE?
<4>1) When The Earth Rotated Once Around The Sun, One Day Has Passed
<3>2) Rotating Around The Sun Is The Reason Why We Have Mornings & Nights
<4>3) The Distance Between The Sun & Earth Almost Constant As Earth Rotates Around The Sun
<3>4) All Of The Above
<4>5) None Of The Above
A) The best answer is 1) Neuron. To arrive at this answer, we can evaluate each option:
<4>1) Neuron - Neurons are excitable cells responsible for transmitting information in the nervous system.
<3>2) Electron - Electrons are subatomic particles and not considered excitable cells.
<4>3) Hormone - Hormones are chemical messengers produced by glands, they are not considered excitable cells.
<3>4) Both 1 & 2 - This option is incorrect because electrons are not excitable cells.
<4>5) All Of The Above - This option is incorrect because hormones are not excitable cells.
Thus, the best answer is 1) Neuron.
B) The best answer is 1) Adenosine Triphosphate (ATP). To arrive at this answer, we can evaluate each option:
<4>1) Adenosine Triphosphate (ATP) - ATP is a molecule that provides energy for many cellular activities.
<3>2) Adenosine Diphosphate (ADP) - ADP is a precursor to ATP and does not directly energize cellular activities.
<4>3) Deoxyribose Nucleic Acid (DNA) - DNA is a genetic material and does not directly energize cellular activities.
<3>4) Ribose Nucleic Acid (RNA) - RNA is involved in protein synthesis and does not directly energize cellular activities.
<4>5) H2O - Water (H2O) is essential for life but does not directly energize cellular activities.
Thus, the best answer is 1) Adenosine Triphosphate (ATP).
C) The best answer is 2) Purines - Pyrimidines. To arrive at this answer, we can evaluate each option:
<4>1) Purines - Purines - This pairing is incorrect because purines (adenine and guanine) do not pair with each other in DNA.
<3>2) Purines - Pyrimidines - This is the correct complementary base pairing in DNA. Adenine (purine) pairs with thymine (pyrimidine), and cytosine (pyrimidine) pairs with guanine (purine).
<4>3) Pyrimidines - Pyrimidines - This pairing is incorrect because pyrimidines (cytosine and thymine) do not pair with each other in DNA.
<3>4) A-U & C-G - This is the pairing found in RNA, not DNA. In RNA, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).
<4>5) A-C & G-U - This pairing is incorrect and not found in DNA. Adenine (A) does not pair with cytosine (C) in DNA, and guanine (G) does not pair with uracil (U).
Thus, the best answer is 2) Purines - Pyrimidines.
D) The best answer is 2) Rotating Around The Sun Is The Reason Why We Have Mornings & Nights. To arrive at this answer, we can evaluate each option:
<4>1) When The Earth Rotated Once Around The Sun, One Day Has Passed - This statement is true. One complete rotation of the earth around the sun (approximately 365.25 days) corresponds to one day passing.
<3>2) Rotating Around The Sun Is The Reason Why We Have Mornings & Nights - This statement is true. The rotation of the Earth on its axis causes day and night as different parts of the Earth are either facing or away from the Sun.
<4>3) The Distance Between The Sun & Earth Almost Constant As Earth Rotates Around The Sun - This statement is false. The distance between the Sun and Earth changes as the Earth orbits the Sun in an elliptical path.
<3>4) All Of The Above - This option is incorrect because statement 3 is false.
<4>5) None Of The Above - This option is incorrect because statement 2 is true.
Thus, the best answer is 2) Rotating Around The Sun Is The Reason Why We Have Mornings & Nights.