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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: Recombinant DNA, Gene Cloning, PCR and Genetic Engineering

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  • Questions count: 16
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1.
To distinguish between a white precipitate of barium sulfate (BaSO4) and a white precipitate of barium phosphate (Ba3(PO4)2), one should add:
Boiling distilled water
Ammonium hydroxide solution
Concentrated nitric acid in the dark
Dilute hydrochloric acid (Ba3(PO4)2 dissolves while BaSO4 remains insoluble)
2.
The indicator that exhibits a yellow color in acidic medium, blue in alkaline medium, and green in neutral medium is:
Bromothymol blue
Litmus solution
Phenolphthalein
Methyl orange
3.
The common ratio r of the geometric sequence (64, 32, 16, 8, ...) is:
r = 2
r = 4
r = 1/2
r = -1/2
4.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = a * c
b = a2 + c2
b = (a + c) / 2
b = + sqrt(a * c)
5.
The number of terms in the finite arithmetic sequence (5, 9, 13, ..., 81) is:
19 terms
21 terms
25 terms
20 terms
6.
The sum to infinity of the geometric series 16 + 8 + 4 + 2 + ... equals:
30
64
24
32
7.
The derivative of f(x) = 4 x3 - 5 x2 + 7 x - 9 with respect to x is:
f'(x) = 12 x2 - 10 x + 7
f'(x) = 4 x2 - 5 x + 7
f'(x) = 12 x3 - 10 x2 + 7
f'(x) = 12 x2 - 10 x
8.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(2, 1)
(0, 5)
(2, 0)
(4, 5)
9.
The hydrostatic pressure exerted by a static homogeneous liquid of density rho at depth h beneath its free surface is expressed by:
P = 1/2 rho * g * h2
P = rho * h / g
P = rho * g * h
P = rho * g / h
10.
The direct cause of myxedema in an adult is:
Excessive increase in growth hormone
Severe deficiency in thyroxine secretion in adulthood
Hyperactivity of the parathyroid gland
Insulin deficiency
11.
Identical (monozygotic) twins arise genetically as a result of:
Fertilization of one egg by one sperm, then the resulting cell mass is divided into two parts that are identical in genetic makeup and sex.
Artificial parthenogenesis
Fertilization of one egg by two sperm
Fertilization of two eggs by two different sperm
12.
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
6 Polar bodies
12 A polar body
9 Polar bodies (assuming division of the first polar body)
13.
Telomeres are found at the ends of eukaryotic chromosomes and perform an important function in:
Synthesis of enzymes
Centromere doubling
Construction of ribosomes
Protecting chromosomes from corrosion and merging with each other and maintaining their structure
14.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Sucrose solution
Hyaluronic acid
Colchicine, mustard gas, or nitrous acid
Glycerin
15.
Polyribosome is a vital cellular structure consisting of:
Mitochondrial aggregation
Accumulated peripheral granules
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.
Fusion of two nuclei
16.
The global scientific project that was able to decipher and arrange more than 3 billion pairs of nitrogenous bases in human cells is:
Human Genome Project
Stem cell project
Acquired immunity project
Virus study project
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