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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2 Quiz: The Human Immune System (Organs, Cells, and Antibodies)

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  • Questions count: 20
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1.
The common ratio r of the geometric sequence (64, 32, 16, 8, ...) is:
r = 4
r = 1/2
r = 2
r = -1/2
2.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
24 x (3 x2 - 5)3
4 (3 x2 - 5)3
6 x (3 x2 - 5)3
12 x (3 x2 - 5)4
3.
The enzyme that catalyzes the peptidyl transferase reaction and the formation of the peptide bond between amino acids during translation is:
DNA polymerase enzyme
Part of the rRNA molecule that makes up the subunit of the ribosomal subunit
Helix enzyme
Release factor protein
4.
The covalent chemical bond that connects the heavy and light peptide chains in an antibody molecule is:
Weak hydrogen bonds
Additional peptide bonds
Ionic bonds
Disulfide Bonds - S-S
5.
Charles's Law establishes that at constant pressure, the volume of a given mass of gas is directly proportional to its:
Square of the absolute temperature
Celsius temperature only
Absolute temperature in Kelvin (T_K = t_C + 273.15)
Atmospheric density
6.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A torsion balance
A venturi meter and manometer
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
A hydrometer
7.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = (a + c) / 2
b = a2 + c2
b = a * c
b = + sqrt(a * c)
8.
The universal gas constant R in SI units has the numerical value and dimensions of:
8.314 J / (mol . K)
1.38 x 10−23 Pa . m3
6.022 x 1023 J / K
0.0821 J / mol
9.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 1' (C1')
Carbon atom number 3'
Carbon atom number 2'
Carbon atom number 5'
10.
The anticodon on the tRNA molecule carrying methionine is:
UAC
AUG
CAU
GUA
11.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = 2 a c / (a + c)
b = a + c
b = (a + c) / 2
b = sqrt(a * c)
12.
If (x - 1, x + 2, 3x) form a geometric sequence, the positive value of x is:
4
6
2
3
13.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Peptidyl site (P) and aminoacyl site (A)
Coiling site and binding site
The location of the palace and the location of the IUD
Location 5' And site 3'
14.
The thermal multiplex device (PCR - Polymerase Chain Reaction) depends on an enzyme that tolerates high temperatures called:
Amylase enzyme
Human DNA polymerase enzyme
Taq polymerase enzyme
RNA polymerase enzyme
15.
Boyle's Law states that for a fixed mass of an ideal gas kept at constant temperature, the volume V is:
Inversely proportional to its absolute pressure P (P1 * V1 = P2 * V2)
Directly proportional to absolute temperature
Independent of pressure changes
Directly proportional to pressure
16.
The 7th term of the geometric sequence (2, 6, 18, ...) is:
162
486
1458
729
17.
The number of amino acid molecules in a polypeptide chain resulting from mRNA translation consisting of 303 nucleotides, including the start and stop codons, is equal to:
300 Acid
99 Acid
100 Amino acid
101 Acid
18.
The atomic radii of the elements from Chromium to Copper remain remarkably steady and nearly constant across the first transition series because of:
The sudden increase in atomic mass
The mutual compensation between the increasing nuclear charge and the repulsive forces among accumulated 3d electrons
Decreasing ionization energies
The identical number of neutrons in their nuclei
19.
The n-th term of an arithmetic sequence with first term a and common difference d is given by:
T_n = a + (n - 1) * d
T_n = a + n * d
T_n = a * rn − 1
T_n = 1/2 n (2a + d)
20.
The pressure of a gas trapped inside an incandescent light bulb is 0.8 atm at room temperature (27 °C). When the bulb operates, the filament heats the gas to 327 °C at constant volume. The operational pressure is:
2.4 atm
1.6 atm
0.96 atm
1.2 atm
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