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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 4 Quiz: Menstrual Cycle, Fertilization, Embryonic Development and Contraception

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  • Questions count: 20
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1.
The ion directly responsible for the explosion of synaptic vesicles and the release of acetylcholine in the neuromuscular synapse cleft is:
Sodium ion Na+
Chloride ion Cl−
Calcium ion Ca2+
Potassium ion K+
2.
Immunoglobulin (antibody), which exists as a pentamer and contains 10 sites to bind to the antigen is:
IgG
IgM
IgE
IgA
3.
Monocytes are functionally capable of leaving the bloodstream when needed:
Transform into active macrophages to engulf microbes and cellular debris
Histamine secretion
Transformation into B cells
Antibody formation
4.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
To reduce the gravitational pull of the bedrock
To allow fish to swim upstream through drainage gates
To prevent solar radiation from penetrating the foundation
5.
Which of the following amino acids is considered a non-protein acid produced by plants as protective and toxic substances for microorganisms?
Methionine and tryptophan
Valine and leucine
Glycine and alanine
Canavanine and cephalosporin
6.
The sum to infinity of the geometric series 12 + 6 + 3 + 1.5 + ... equals:
24
18
36
Infinity
7.
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)
Cr3+ ([Ar] 3d3 with 3 unpaired electrons)
Zn2+ ([Ar] 3d10 with 0 unpaired electrons)
8.
A metal cation that forms a gelatinous white precipitate with NaOH which completely redissolves in excess reagent to form a soluble clear solution is:
Ca2+
Al3+ (due to the formation of soluble sodium meta-aluminate NaAlO2)
Fe2+
Fe3+
9.
The equation of the tangent line to the curve y = x3 at the point (1, 1) is:
y = 3x - 2
y = -3x + 4
y = x
y = 3x + 1
10.
The two main functional sites on the tRNA molecule are:
The amino acid binding site is at the 3′ end' (sequence CCA), and anticodon site
DNA polymerase site and binding site
Start location and stop location
Phosphate site and sugar site
11.
The Cowper glands and the prostate gland in the male reproductive system secrete an alkaline fluid that passes into the urethra to:
Semen storage
Balancing the acidity of the urethra to ensure the passage and safety of sperm
Sperm production
Secretion of testosterone
12.
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:
4 / 3 (since P1 / T1 = P2 / T2)
2 times
127 / 27
16 / 9
13.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
61 Codons (out of a total of 64 codons after excluding the three stop codons)
20 Codona
64 Codona
32 Codona
14.
The contraceptive method that prevents the fertilized egg from settling in the uterine lining without hindering the ovulation or fertilization processes is:
IUD
Contraceptive pills
Condom
Surgical ligation of the fallopian tubes
15.
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
16.
Hydra and planaria share the ability to reproduce asexually by:
Regeneration
Bacteria formation
Longitudinal binary fission
Budding only
17.
A hormone secreted from the anterior lobe of the pituitary gland that stimulates the growth of Graafian follicles in the female ovary and the production of sperm in the male testicle is:
Prolactin hormone
ACTH hormone
Luteinizing hormone (LH)
follicle stimulating hormone (FSH)
18.
Watch out! The ladder is shaking violently. You ________ fall!
will
have
were
are going to
19.
If (x - 1, x + 2, 3x) form a geometric sequence, the positive value of x is:
4
2
6
3
20.
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
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