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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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  • Questions count: 20
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1.
The cells that secrete the hormones oxytocin and ADH and store them in the posterior lobe of the pituitary gland are:
Pineal gland cells
Apocrine neurons in the hypothalamus (hypothalamus)
Frontal lobe glandular cells
Glial cells
2.
Polyribosome is a vital cellular structure consisting of:
Fusion of two nuclei
Accumulated peripheral granules
Mitochondrial aggregation
A large number of ribosomes (up to 100 ribosomes) attach to a single mRNA molecule to translate it simultaneously and quickly build many copies of the protein.
3.
The first human protein produced commercially using recombinant DNA technology to treat diabetics is:
Human hormone insulin (Insulin)
Interferon protein
Hemoglobin
Growth hormone
4.
The enzyme extracted from RNA viruses and used to convert mRNA into a single strand of complementary DNA (cDNA) is:
Reverse transcriptase
Ligase enzyme
Palace enzyme
RNA polymerase enzyme
5.
The second derivative d2y/dx2 of the function y = x4 - 2 x3 + 5 is:
4 x3 - 6 x2
12 x2 - 6 x
12 x2 - 12 x
24 x - 12
6.
The movement of tension in the tendrils of climbing plants such as peas and grapes depends physiologically on:
Slow growth of the area in contact with the support and rapid growth of the area far from it as a result of the varying distribution of auxins
Degeneration of tendril cells
Water loss through rapid transpiration
Secretion of gluey substances
7.
The hormone that affects both glandular and non-glandular tissue in the adult female body is:
Aldosterone hormone
Calcitonin hormone
Oxytocin
Growth hormone
8.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
Iron(III) sulfate only
Iron(II) sulfate and hydrogen gas only
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
Elemental iron and sulfur dioxide
9.
When dilute hydrochloric acid is added to a solid salt, a gas is evolved with a pungent odor that turns acidified potassium dichromate paper green while a colloidal yellow precipitate of sulfur separates in the reaction vessel. The anion is:
Sulfite (SO32−)
Sulfide (S2−)
Sulfate (SO42−)
Thiosulfate (S2O32−)
10.
While the students ________ in the art workshop, the tour guide arrived.
were working
are working
worked
work
11.
The chemical formula of aluminum sulfate is correctly written as:
Al2(SO4)3
Al3(SO4)2
AlSO4
Al(SO4)3
12.
The chemical compound secreted by mast cells and basal white blood cells that is responsible for the widening of blood vessels and symptoms of inflammation is:
Interleukin
Albumin
Histamine
Heparin
13.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
Secreted antibodies
Histamine molecules
Perforin protein
14.
Acids are chemical compounds that dissociate in aqueous solutions to produce:
Hydrogen ions (H+ or hydronium ions H3O+), turning blue litmus paper red
Sodium ions and chlorine gas
Precipitated metallic salts
Hydroxide ions (OH-) turning red litmus paper blue
15.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
They decompose in the presence of air
Electrons are moving too rapidly
They contain no electrical charges
16.
Immune chemicals secreted by virus-infected cells to warn neighboring healthy cells to produce enzymes that inhibit virus replication.S is:
Interferons
Complements
Interleukins
Chemokines
17.
DNA Repair Enzymes, which number approximately 20 enzymes, depend for their work on:
Heat irradiation of the cell
The presence of a corresponding healthy template strip complementary to the damaged strip to guide its sequence in repair
Destruction of the infected cell
Production of lipoproteins
18.
In the human female, the second (delayed/conditional) meiotic division of the secondary oocyte takes place in:
The fallopian tube when the sperm enters the head for fertilization to occur
Uterine cavity
Graaf's vesicle
Ovaries before ovulation
19.
The surface immune receptor characteristic of T helper cells (Th) that enables them to recognize the antigen complex with the MHC protein is:
CD4 receptor
BCR receptor
CD3 receptor
CD8 receptor
20.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is red in both
It is colorless in both
It is blue in both
It precipitates in both
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