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Biology & Geology

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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Quiz

Lesson 3 Quiz: Mechanism of the Immune System (Lines of Defense & Humoral/Cellular Immunity)

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1.
The apple is considered a false fruit from a morphological and anatomical perspective because:
It is made without seeds
The cup leaves become greasy
Produced from a hermaphrodite flower
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
2.
The lymphocytes responsible for secreting specific antibodies in humoral immunity are:
Plasma B cells
Helper T cells (TH)
Natural killer (NK) cells
Macrophages
3.
Which of the following hormones is secreted by the pituitary gland and indirectly affects basic metabolic processes and the speed of oxygen consumption?
Insulin hormone
ADH hormone
The hormone oxytocin
Thyroid stimulating hormone (TSH).
4.
A gas cylinder contains 10 liters of gas at a pressure of 3.0 atm. If the volume is reduced to 2.5 liters at constant temperature, the new pressure inside the cylinder will be:
12.0 atm
1.2 atm
6.0 atm
7.5 atm
5.
The outer embryonic membrane that surrounds the uterine membrane and from which digital villi emerge, which are immersed in the uterine lining to form the placenta, is:
Amniotic membrane (Chorion)
Corpus luteum
Sagging membrane
umbilical cord
6.
Charles's Law establishes that at constant pressure, the volume of a given mass of gas is directly proportional to its:
Celsius temperature only
Square of the absolute temperature
Atmospheric density
Absolute temperature in Kelvin (T_K = t_C + 273.15)
7.
The contraceptive method that prevents the fertilized egg from settling in the uterine lining without hindering the ovulation or fertilization processes is:
Condom
Surgical ligation of the fallopian tubes
Contraceptive pills
IUD
8.
The antibody that is transferred across the placenta from the blood of the pregnant mother to the blood of the fetus to give it natural, passive, acquired immunity is:
IgM
IgE
IgD
IgG
9.
Mutations that are inherited to future generations and occur in reproductive cells that produce gametes are called:
Somatic mutations
Temporary spikes
Rebound mutations
Gamete mutations
10.
The derivative of y = sin(3x) with respect to x is:
3 sin(3x)
3 cos(3x)
-3 cos(3x)
cos(3x)
11.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Doubles to twice its original volume
Quadruples
Decreases to one-fourth
Remains constant and unchanged
12.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
It absorbs all visible wavelengths of light
Chlorine ions quench all magnetic dipoles
Titanium is an alkali earth metal
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
13.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
15 roll
60 roll
30 Full roll
10 Rolls
14.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
22%
56%
44%
28%
15.
A transition element whose +5 oxidation state compound (V2O5) is widely utilized as an industrial catalyst in the Contact Process for sulfuric acid manufacturing and as a colorant in ceramics is:
Manganese (25Mn)
Cobalt (27Co)
Scandium (21Sc)
Vanadium (23V)
16.
Immunoglobulin (antibody), which exists as a pentamer and contains 10 sites to bind to the antigen is:
IgM
IgA
IgE
IgG
17.
The covalent chemical bond that connects the heavy and light peptide chains in an antibody molecule is:
Disulfide Bonds - S-S
Weak hydrogen bonds
Additional peptide bonds
Ionic bonds
18.
An ionic bond is formed primarily between:
Two non-metal atoms sharing pairs of valence electrons equally
Noble gas atoms at very low temperatures
A metal atom that loses electrons forming a cation and a non-metal atom that gains electrons forming an anion due to electrostatic attraction
Positive metal ions immersed in a sea of delocalized electrons
19.
The n-th term of an arithmetic sequence with first term a and common difference d is given by:
T_n = a * rn − 1
T_n = a + n * d
T_n = 1/2 n (2a + d)
T_n = a + (n - 1) * d
20.
Artificial parthenogenesis in flowering plants (such as the production of seedless oranges or watermelons) is carried out by:
Spraying flower stigmas with pollen extract or indole acetic acid to stimulate the ovary to form fruit without fertilization
Irradiating seeds with X-rays
Tissue culture
Pen vaccination
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