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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: Rock Cycle, Minerals, Crystallography and Weathering

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1.
The derivative of y = sin(3x) with respect to x is:
3 cos(3x)
cos(3x)
-3 cos(3x)
3 sin(3x)
2.
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
3.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(0, 5)
(4, 5)
(2, 1)
(2, 0)
4.
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
5.
Charles's Law establishes that at constant pressure, the volume of a given mass of gas is directly proportional to its:
Absolute temperature in Kelvin (T_K = t_C + 273.15)
Square of the absolute temperature
Atmospheric density
Celsius temperature only
6.
The direct cause of myxedema in an adult is:
Insulin deficiency
Excessive increase in growth hormone
Severe deficiency in thyroxine secretion in adulthood
Hyperactivity of the parathyroid gland
7.
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
Luteinizing hormone (LH)
follicle stimulating hormone (FSH)
ACTH hormone
8.
What is the direct physiological effect of injecting a healthy person with an excessive dose of the hormone insulin?
A sharp increase in blood sugar
Increased urine secretion
Uric acid accumulation
A severe drop in blood glucose levels (hypoglycemia) and hypoglycemic coma
9.
The protein secreted by cytotoxic T cells (Tc) that creates holes in the plasma membrane of the target cell is:
Perforin protein
Complement C3
globulin
Interleukin
10.
The anticodon on the tRNA molecule carrying methionine is:
AUG
CAU
GUA
UAC
11.
In eukaryotic cells, rRNA molecules are synthesized and assembled under ribosomal subunits within:
Nucleolus
Smooth endoplasmic reticulum
Golgi apparatus
directly into the cytoplasm
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