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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 substance that the plant secretes to close wounds in its woody stems and completely isolate the affected tissue from the air and microbes is:
Liquid auxins
Monosaccharides
Ascorbic acid
Gum and cork
2.
The atomic radii of the elements from Chromium to Copper remain remarkably steady and nearly constant across the first transition series because of:
The sudden increase in atomic mass
Decreasing ionization energies
The identical number of neutrons in their nuclei
The mutual compensation between the increasing nuclear charge and the repulsive forces among accumulated 3d electrons
3.
Combined contraceptive pills are considered an effective method because they:
It contains synthetic hormones similar to estrogen and progesterone that inhibit the secretion of FSH and LH from the pituitary, thus preventing the maturation of eggs and the occurrence of ovulation.
The fallopian tubes close mechanically
Placental abruption
It kills sperm
4.
The standard start codon in an mRNA molecule recognized by the first tRNA molecule carrying methionine is:
UGA
AUG
UAA
UAG
5.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
-5
7
12
1
6.
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:
Luteinizing hormone (LH)
ACTH hormone
Prolactin hormone
follicle stimulating hormone (FSH)
7.
The sum of the first 10 terms of the geometric sequence 2, 6, 18, 54, ... equals:
118,096
29,524
19,682
59,048
8.
If y = sin(3x) + cos(2x), then dy/dx at x = 0 equals:
-2
3
5
1
9.
Watch out! The ladder is shaking violently. You ________ fall!
will
are going to
were
have
10.
The sum to infinity of the geometric series 16 + 8 + 4 + 2 + ... equals:
30
32
64
24
11.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = (a + c) / 2
b = 2 a c / (a + c)
b = sqrt(a * c)
b = a + c
12.
The sum of the first n terms of an arithmetic sequence (S_n) is formulated as:
S_n = a * (1 - rn) / (1 - r)
S_n = n / 2 * [ 2a + (n - 1) * d ] = n / 2 * [ a + l ]
S_n = a / (1 - r)
S_n = n * (a + d)
13.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
Chlorine ions quench all magnetic dipoles
Titanium is an alkali earth metal
It absorbs all visible wavelengths of light
14.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
Secretes digestive enzymes
The largest gland by weight
Connected to the liver
15.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 2
m = 8
m = -3
m = -2
16.
The volume expansion coefficient at constant pressure (alpha_v) and the pressure expansion coefficient at constant volume (beta_p) for all ideal gases have the universal constant value of:
273.15 K
8.314 J/(mol.K)
1.013 x 105 Pa
1 / 273.15 K−1 (approx. 0.00366 K−1)
17.
A metal cation that forms a gelatinous white precipitate with NaOH which completely redissolves in excess reagent to form a soluble clear solution is:
Fe2+
Ca2+
Fe3+
Al3+ (due to the formation of soluble sodium meta-aluminate NaAlO2)
18.
The sum to infinity of the geometric series 12 + 6 + 3 + 1.5 + ... equals:
36
Infinity
24
18
19.
The reaction between an acid and a base to produce a salt and water is known as a:
Combustion reaction
Thermal decomposition reaction
Polymerization reaction
Neutralization reaction
20.
The n-th term of an arithmetic sequence with first term a and common difference d is given by:
T_n = a + n * d
T_n = 1/2 n (2a + d)
T_n = a + (n - 1) * d
T_n = a * rn − 1
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