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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: Recombinant DNA, Gene Cloning, PCR and Genetic Engineering

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1.
Which of the following oxides is amphoteric?
MgO
SO3
ZnO
Na2O
2.
The outer embryonic membrane that surrounds the uterine membrane and from which digital villi emerge, which are immersed in the uterine lining to form the placenta, is:
Sagging membrane
umbilical cord
Amniotic membrane (Chorion)
Corpus luteum
3.
The hormone that is secreted from the corpus luteum and reaches its maximum concentration on days 21 to 23 of menstruation is:
Progesterone
FSH hormone
LH hormone
Estrogen
4.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
Elemental iron and sulfur dioxide
Iron(III) sulfate only
Iron(II) sulfate and hydrogen gas only
5.
Which of the following solutions has the lowest pH value (strongest acidity) at equal concentration?
HCl
CH3COOH
NaCl
NH4OH
6.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
comfort
gardens
stations
congestion
7.
According to Chargaff's rules's Rules) In the DNA double helix, the equal ratio is always:
The ratio of adenine A equals thymine T, and the ratio of guanine G equals cytosine C (A+G). = T+C)
A + T = G + C always
A = G And T = C
A / T = 2
8.
If a sample of a DNA double helix contains 30% Cytosine (C), the percentage of adenine (A) bases in this sample is equal to:
30%
70%
20%
40%
9.
In a titration experiment, 20.0 mL of 0.15 M H2SO4 is completely neutralized by 30.0 mL of NaOH solution. The molar concentration of the NaOH solution is:
0.10 M
0.05 M
0.30 M
0.20 M
10.
In a U-tube manometer containing two immiscible liquids in equilibrium, the heights of the liquid columns measured above the separating surface are:
Inversely proportional to their respective densities (h1 / h2 = rho2 / rho1)
Equal regardless of the liquids used
Directly proportional to their densities
Proportional to the square of the cross-sectional area of the tube
11.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Hydrogen gas produced from the electrolysis of water
Carbon dioxide mixed with limestone
Pure carbon monoxide (CO) produced from metallurgical coke
12.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Remains constant and unchanged
Decreases to one-fourth
Doubles to twice its original volume
Quadruples
13.
Complements are a group of plasma proteins that activate when an antibody binds to an antigen and work to:
Histamine secretion
Blood clotting
Activate viruses
Decomposing the antigenic envelope and dissolving its contents to facilitate their ingestion by macrophages
14.
Which of the following hormones is considered a steroid hormone (derived from fat and cholesterol)?
Thyroxine
Progesterone and testosterone
Insulin
Growth hormone (GH)
15.
A fixed quantity of an ideal gas has a volume of 600 cm3 at 27 °C. If the gas is heated to 127 °C under constant pressure, its new volume will be:
1200 cm3
900 cm3
700 cm3
800 cm3
16.
I have already booked the flight tickets. I ________ to London next Friday.
will travel
am traveling
travel
traveled
17.
The enzyme responsible for separating the two strands of DNA from each other by breaking hydrogen bonds during replication is:
Ligase
Palace enzyme
Helicase enzyme
DNA polymerase
18.
Immunoglobulin (antibody), which exists as a pentamer and contains 10 sites to bind to the antigen is:
IgA
IgE
IgG
IgM
19.
The number of hydrogen bonds between the nitrogenous base pair guanine and cytosine (G - C) is:
3 Hydrogen bonds
4 Links
One bond
Two hydrogen bonds
20.
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
1.013 x 105 Pa
1 / 273.15 K−1 (approx. 0.00366 K−1)
8.314 J/(mol.K)
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