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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 2 Quiz: Adrenal Glands, The Pancreas and Reproductive Gonads

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1.
The amount of DNA in a human female secondary oocyte compared to a resting somatic skin cell (before replication begins) is:
Equal (contains 46 DNA molecules in the form of 23 diploid chromosomes)
Quarter
Weakness
Half the quantity
2.
A metallic bond is physically described as the electrostatic attraction between:
Positive ions and negative non-metal anions
Dipole molecules in a polar liquid
Protons and neutrons in the nucleus
Positive metal cations in the crystal lattice and the mobile sea of delocalized valence electrons
3.
The fetal membrane that directly surrounds the fetus and secretes a fluid that protects it from shock and dehydration and facilitates its movement is:
Amnion
Amniotic membrane (Chorion)
Plasma membrane
Vitelline membrane
4.
The Ancon breed mutation in sheep with short, arched legs is considered a mutation:
Numerical chromosome
Fatal to fetuses
Harmful innovation
A useful mechanism that the breeder kept in mind to prevent sheep from jumping fences and damaging crops
5.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = sqrt(a * c)
b = a + c
b = 2 a c / (a + c)
b = (a + c) / 2
6.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
congestion
comfort
gardens
stations
7.
Hydra and planaria share the ability to reproduce asexually by:
Budding only
Longitudinal binary fission
Bacteria formation
Regeneration
8.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
-5
12
1
7
9.
The protein secreted by cytotoxic T cells (Tc) that creates holes in the plasma membrane of the target cell is:
Perforin protein
Interleukin
Complement C3
globulin
10.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Mild spring
Complete darkness
Abundance of pure fresh water
11.
Aldosterone directly maintains electrolyte homeostasis by promoting:
Sodium reabsorption and potassium excretion in kidney tubules
Water loss through sweat glands
Glucose excretion in urine
Calcium absorption in the duodenum
12.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
4 (3 x2 - 5)3
24 x (3 x2 - 5)3
12 x (3 x2 - 5)4
6 x (3 x2 - 5)3
13.
The method of action of antibodies that is considered the most appropriate and most efficient in inactivating viruses and preventing their penetration into cells is:
Deposition method
Decomposition method
Neutralization method
Alignment method
14.
DNA polymerase always adds new nucleotides in a specific direction:
From party 5' To party 3' For new growing bar only
From party 3' to 5' only
In both directions together
randomly
15.
If y = sin(3x) + cos(2x), then dy/dx at x = 0 equals:
3
-2
1
5
16.
Cells that carry CD8 receptors and directly eliminate cancer cells, virus-infected cells, and transplanted organs are:
Memory B cells
Mast cells
Helper T cells (Th)
Cytotoxic T cells
17.
The global scientific project that was able to decipher and arrange more than 3 billion pairs of nitrogenous bases in human cells is:
Virus study project
Stem cell project
Human Genome Project
Acquired immunity project
18.
Rotational cytoplasmic movement inside living plant cells (such as Elodea plants) is indicated by:
Change in cell wall thickness
Stomata open
Movement of chloroplasts immersed in the cytoplasm stream in a constant rotational direction
Mitochondrial division
19.
The movement of hydrotropism in plant roots is considered tropism:
Positive (the root bends in the direction of moisture and water concentration)
Unaffected
Negatively
randomly
20.
The relative density (specific gravity) of a substance is defined as:
The mass of the substance divided by its volume at 100°C
The product of density and the acceleration due to gravity
The reciprocal of the buoyant force
The ratio of the density of the substance to the density of pure water at 4°C
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