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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: 20
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1.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
24 x (3 x2 - 5)3
4 (3 x2 - 5)3
6 x (3 x2 - 5)3
12 x (3 x2 - 5)4
2.
In the life cycle of the Plasmodium malaria parasite, the human infective phase is:
Merozoites
Gametophytes
Kinetic phase (okinete)
Sporozoites
3.
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 = a + c
b = sqrt(a * c)
4.
The nitrogen molecule (N2) contains a:
Single ionic bond
Double covalent bond
Coordinate dative bond
Triple covalent bond (one sigma bond and two pi bonds) sharing 3 electron pairs
5.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
12
7
1
-5
6.
Cultivation of plant tissues in a semi-natural nutrient medium (such as coconut milk) is scientific proof of:
The necessity of double fertilization
Seeds are asexual
Effect of thyroxine
A complete living plant cell contains all the genetic information necessary to form a new complete plant
7.
The electronic configurations of both Chromium (24Cr) and Copper (29Cu) are anomalous due to the enhanced stability associated with:
High electronegativity differences
Half-filled (3d5) and completely filled (3d10) d-subshells respectively
Completely empty 4s subshells
Pairing of all electrons in the outer valence level
8.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
The reaction occurs strictly in an alkaline medium
Chlorine cannot react with the inner 3d electrons
Iron(II) chloride spontaneously sublimes into thin air
9.
The infective stage of the female Anopheles mosquito in the life cycle of Plasmodium malaria is:
Zygote
Gametocytes
Sporozoites
Merozoites
10.
DNA polymerase always adds new nucleotides in a specific direction:
From party 3' to 5' only
In both directions together
randomly
From party 5' To party 3' For new growing bar only
11.
The gland that secretes both external ductal secretion and non-ductal hormonal secretion directly into the blood is:
pituitary gland
Adrenal gland
Thyroid gland
Pancreas (common/mixed gland)
12.
What is the structural characteristic of a restriction endonuclease recognition site?
It is a palindromic sequence reading identical 5' to 3' on both strands.
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It contains only adenine and thymine bases.
13.
Sticky Ends resulting from the action of shortening enzymes are characterized by:
Collagen thickened ends
Short, extended single strands of unpaired nucleotides capable of spontaneous association with complementary ends
Ends surrounded by peptide bonds
Inactive phosphate sequences
14.
The enzymes secreted by the plant to break down bacterial toxins and convert them into non-toxic compounds are:
pepsin enzymes
Detoxifying enzymes
Palace enzymes
RNA polymerase enzymes
15.
A mercury manometer connected to a gas tank shows the mercury level in the free arm is 4 cm higher than the gas arm (Pa = 76 cm Hg). The gas pressure is:
72 cm Hg
76 cm Hg
4 cm Hg
80 cm Hg
16.
In prokaryotic cells (such as bacteria), a single circular DNA molecule attaches to the plasma membrane at:
Nuclear envelope
Ribosome
Centrosome
One or more sites from which DNA replication begins
17.
The movement of tension in the tendrils of climbing plants such as peas and grapes depends physiologically on:
Water loss through rapid transpiration
Secretion of gluey substances
Slow growth of the area in contact with the support and rapid growth of the area far from it as a result of the varying distribution of auxins
Degeneration of tendril cells
18.
Party 3' For a DNA strand that ends with a group:
Free hydroxyl (-OH)
Free amine (-NH2)
Free phosphate (-PO4)
Free carboxylate (-COOH)
19.
The enzyme found in the apical body (Acrosome) of the sperm that helps it penetrate the compact envelope of the egg is:
pepsin enzyme
Hyaluronidase enzyme
Amylase enzyme
Cholinesterase enzyme
20.
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
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