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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: Structure of Earth, Geological Time and Structural Geology

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  • Questions count: 20
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1.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
Histamine molecules
Perforin protein
Secreted antibodies
2.
The enzyme extracted from RNA viruses and used to convert mRNA into a single strand of complementary DNA (cDNA) is:
Reverse transcriptase
RNA polymerase enzyme
Palace enzyme
Ligase enzyme
3.
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:
0.05 M
0.20 M
0.10 M
0.30 M
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:
70%
20%
30%
40%
5.
Complements are a group of plasma proteins that activate when an antibody binds to an antigen and work to:
Histamine secretion
Activate viruses
Blood clotting
Decomposing the antigenic envelope and dissolving its contents to facilitate their ingestion by macrophages
6.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
12
7
-5
1
7.
If y = sin(3x) + cos(2x), then dy/dx at x = 0 equals:
-2
3
5
1
8.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
10 Rolls
30 Full roll
60 roll
15 roll
9.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(2, 1)
(4, 5)
(0, 5)
(2, 0)
10.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 8
m = -3
m = 2
m = -2
11.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
20 Codona
32 Codona
61 Codons (out of a total of 64 codons after excluding the three stop codons)
64 Codona
12.
Connecting two complementary DNA strands by hydrogen bonds makes them:
connected by peptide bonds
criss-crossing each lap
Two exactly identical bars in the same direction
Two parallel strands in opposite directions that are chemically complementary
13.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
comfort
congestion
stations
gardens
14.
Interstitial cells in the human male testicle respond directly and secrete testosterone under the influence of a pituitary hormone:
Luteinizing hormone (LH)
Prolactin hormone
Growth hormone
FSH hormone
15.
The surface immune receptor characteristic of T helper cells (Th) that enables them to recognize the antigen complex with the MHC protein is:
CD4 receptor
CD8 receptor
CD3 receptor
BCR receptor
16.
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.
Fertilization of one egg by two sperm
Artificial parthenogenesis
Fertilization of two eggs by two different sperm
17.
The enzyme found in the apical body (Acrosome) of the sperm that helps it penetrate the compact envelope of the egg is:
Amylase enzyme
Hyaluronidase enzyme
pepsin enzyme
Cholinesterase enzyme
18.
The enzyme responsible for constructing an mRNA strand from one of the two DNA strands (template strand 3' to 5') he:
DNA polymerase enzyme
Binding enzyme
Palace enzyme
RNA polymerase
19.
The equation of the tangent line to the curve y = x3 at the point (1, 1) is:
y = 3x - 2
y = -3x + 4
y = 3x + 1
y = x
20.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Peptidyl site (P) and aminoacyl site (A)
Location 5' And site 3'
The location of the palace and the location of the IUD
Coiling site and binding site
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