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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 1 Quiz: Types of RNA, Genetic Code and Protein Translation

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  • Questions count: 20
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1.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
Ribonuclease enzyme
DNA polymerase enzyme
Deoxyribonuclease enzyme
pepsin enzyme
2.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Doubles to twice its original volume
Quadruples
Decreases to one-fourth
Remains constant and unchanged
3.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
15 roll
10 Rolls
30 Full roll
60 roll
4.
If a sample of a DNA double helix contains 30% Cytosine (C), the percentage of adenine (A) bases in this sample is equal to:
20%
40%
70%
30%
5.
The equation of the tangent line to the curve y = x3 at the point (1, 1) is:
y = x
y = 3x - 2
y = 3x + 1
y = -3x + 4
6.
The surface immune receptor characteristic of T helper cells (Th) that enables them to recognize the antigen complex with the MHC protein is:
CD8 receptor
CD3 receptor
BCR receptor
CD4 receptor
7.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
congestion
stations
gardens
comfort
8.
The number of hydrogen bonds between the nitrogenous base pair guanine and cytosine (G - C) is:
4 Links
3 Hydrogen bonds
Two hydrogen bonds
One bond
9.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 2'
Carbon atom number 5'
Carbon atom number 1' (C1')
Carbon atom number 3'
10.
Connecting two complementary DNA strands by hydrogen bonds makes them:
Two parallel strands in opposite directions that are chemically complementary
Two exactly identical bars in the same direction
connected by peptide bonds
criss-crossing each lap
11.
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:
Amniotic membrane (Chorion)
Corpus luteum
umbilical cord
Sagging membrane
12.
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:
0.20 M
0.10 M
0.30 M
0.05 M
13.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = -3
m = 2
m = -2
m = 8
14.
A metallic cube of side length 10 cm and density 7800 kg/m3 is completely submerged in water (density 1000 kg/m3). The buoyant force (upthrust) acting on the cube is (g = 10 m/s2):
68 N
100 N
78 N
10 N
15.
Party 3' For a DNA strand that ends with a group:
Free amine (-NH2)
Free carboxylate (-COOH)
Free phosphate (-PO4)
Free hydroxyl (-OH)
16.
Which of the following oxides is classified as an amphoteric oxide that reacts with both acids and bases to yield salt and water?
Aluminum oxide (Al2O3)
Sodium oxide (Na2O)
Carbon dioxide (CO2)
Sulfur trioxide (SO3)
17.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
22%
28%
56%
44%
18.
DNA hybridization depends on the ability of single strands from different sources to combine if:
They are just the same height and weight
Treatment with shortening enzyme
Made in the same cell
They contain complementary sequences of nitrogenous bases and are linked by hydrogen bonds
19.
A metal cation that forms a gelatinous white precipitate with NaOH which completely redissolves in excess reagent to form a soluble clear solution is:
Fe3+
Ca2+
Al3+ (due to the formation of soluble sodium meta-aluminate NaAlO2)
Fe2+
20.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Perforin protein
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
Secreted antibodies
Histamine molecules
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