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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: DNA Structure, Replication and DNA Repair Enzymes

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1.
A synthetic chromosome mutation that occurs when a piece of chromosome separates, wraps around itself at an angle of 180 degrees, and then rejoins in the same position is called:
Inversion mutation
Transmission mutation
Repetition mutation
Deletion mutation
2.
The hormone that is secreted from the corpus luteum and reaches its maximum concentration on days 21 to 23 of menstruation is:
Progesterone
Estrogen
FSH hormone
LH hormone
3.
Real gases behave most closely to an ideal gas under conditions of:
Extremely high pressure and low temperature
Zero gravitational acceleration
High pressure and near liquefaction point
Very low pressure and high temperature (where intermolecular attraction forces and molecular volumes become negligible)
4.
The enzyme found in the apical body (Acrosome) of the sperm that helps it penetrate the compact envelope of the egg is:
Cholinesterase enzyme
Amylase enzyme
pepsin enzyme
Hyaluronidase enzyme
5.
Pure water reaches its maximum density (1.000 g/cm3 or 1000 kg/m3) at a temperature of:
25.0 °C
4.0 °C
0.0 °C
-4.0 °C
6.
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:
100 Amino acid
99 Acid
300 Acid
101 Acid
7.
Which of the following immune structures represents the first line of defense in the human body to prevent the entry of pathogens?
Toxic T cells
Macrophages
Intact skin with its stratum corneum, mucus, HCl in the stomach, and saliva saturated with lysozyme
Antibodies
8.
Stop codons that bind to the release factor to terminate the translation process are:
UAA And UAG and UGA
CCC And GGG and TTT
AAA And UUU and GGG
AUG And GUG and UUG
9.
The enzyme that catalyzes the peptidyl transferase reaction and the formation of the peptide bond between amino acids during translation is:
Helix enzyme
Part of the rRNA molecule that makes up the subunit of the ribosomal subunit
DNA polymerase enzyme
Release factor protein
10.
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:
Vanadium (23V)
Cobalt (27Co)
Manganese (25Mn)
Scandium (21Sc)
11.
Monocytes are functionally capable of leaving the bloodstream when needed:
Histamine secretion
Transformation into B cells
Transform into active macrophages to engulf microbes and cellular debris
Antibody formation
12.
In Griffith's bacterial transformation experiment, mice died when they were injected with:
A mixture of heat-killed S bacteria with live R bacteria
Sterile saline solution
Heat-killed S bacteria alone
Live R bacteria alone
13.
When a gas trapped inside a rigid container of fixed volume is heated from 27 °C (300 K) to 127 °C (400 K), its pressure increases by a factor of:
2 times
16 / 9
4 / 3 (since P1 / T1 = P2 / T2)
127 / 27
14.
The amount of DNA in a human female secondary oocyte compared to a resting somatic skin cell (before replication begins) is:
Half the quantity
Weakness
Quarter
Equal (contains 46 DNA molecules in the form of 23 diploid chromosomes)
15.
Which of the following first-row transition metal ions exhibits the highest theoretical magnetic moment in its ground state?
Fe3+ ([Ar] 3d5 with 5 unpaired electrons)
Cu2+ ([Ar] 3d9 with 1 unpaired electron)
Zn2+ ([Ar] 3d10 with 0 unpaired electrons)
Cr3+ ([Ar] 3d3 with 3 unpaired electrons)
16.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = a2 + c2
b = + sqrt(a * c)
b = (a + c) / 2
b = a * c
17.
The number of polar bodies resulting from the maturation and fertilization of 3 primary oocytes in the ovary of a human female is equal to:
3 Polar bodies
9 Polar bodies (assuming division of the first polar body)
12 A polar body
6 Polar bodies
18.
Pascal's principle states that when pressure is applied to an enclosed, incompressible fluid, it is transmitted:
Only downwards towards the bottom of the vessel
Strictly to compressible gases
Undiminished to every portion of the fluid and to the walls of the containing vessel
With an exponential decay as distance increases
19.
Absolute zero temperature (0 Kelvin or -273.15 °C) is defined physically as the theoretical temperature at which:
Atmospheric air completely combusts
The volume and pressure of an ideal gas theoretically extrapolate to zero and translational molecular motion reaches its quantum minimum
All liquids solidify into glass
Water reaches its maximum density
20.
Histone proteins responsible for shortening the length of the DNA molecule ten times and forming nucleosomes are characterized by being rich in the two basic amino acids:
Methionine and tryptophan
Glutamic acid and aspartic acid
Arginine and lysine (Arginine & Lysine)
Glycine and alanine
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