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Biology & Geology (STEM)

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.
STEM Endocrinology Question 17: A patient suffers from increased metabolic rate, weight loss, nervousness, and protruding eyes (exophthalmos). Which endocrine condition is most likely diagnosed?
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
Simple endemic goiter due to iodine deficiency
Myxedema resulting from severe hypothyroidism in adults
Cushing's syndrome from elevated cortisol
2.
STEM Molecular Genetics Question 9: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They permanently destroy DNA ligase activity
They mutate bacterial resistance genes permanently
They prevent plasmids from entering bacterial cells
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
3.
STEM Genetics Question 37: What is the minimum number of tRNA anticodons required to translate an mRNA transcript containing 150 codons, terminating with a UAG stop codon?
149 tRNA molecules (stop codons do not code for amino acids or tRNAs)
150 tRNA molecules
151 tRNA molecules
75 tRNA molecules
4.
STEM Geology Question 1: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Strike-slip fault with purely horizontal displacement
Normal fault resulting from crustal extensional (tensional) forces
Reverse fault caused by lateral compressional stress
Thrust fault with an inclination angle less than 45 degrees
5.
Convection currents responsible for the drift and displacement of tectonic plates operate within which Earth layer?
The continental sial crust
The solid lower mantle
The plastic semi-molten Asthenosphere
The liquid outer core
6.
STEM Genetics Question 6: What is the minimum number of tRNA anticodons required to translate an mRNA transcript containing 150 codons, terminating with a UAG stop codon?
151 tRNA molecules
150 tRNA molecules
149 tRNA molecules (stop codons do not code for amino acids or tRNAs)
75 tRNA molecules
7.
STEM Genetics Question 15: What is the minimum number of tRNA anticodons required to translate an mRNA transcript containing 150 codons, terminating with a UAG stop codon?
151 tRNA molecules
150 tRNA molecules
149 tRNA molecules (stop codons do not code for amino acids or tRNAs)
75 tRNA molecules
8.
STEM Geology Question 29: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Thrust fault with an inclination angle less than 45 degrees
Strike-slip fault with purely horizontal displacement
Reverse fault caused by lateral compressional stress
Normal fault resulting from crustal extensional (tensional) forces
9.
STEM Immunology Question 30: Which immune cells are directly responsible for secreting perforin proteins and granzymes to lyse virally infected cells and tumor cells?
Cytotoxic T-cells (CD8+ Tc) and Natural Killer (NK) cells
Mast cells releasing histamine
Plasma B-cells secreting IgG
Helper T-cells (CD4+ Th) exclusively
10.
STEM Immunology Question 24: Which immune cells are directly responsible for secreting perforin proteins and granzymes to lyse virally infected cells and tumor cells?
Plasma B-cells secreting IgG
Mast cells releasing histamine
Cytotoxic T-cells (CD8+ Tc) and Natural Killer (NK) cells
Helper T-cells (CD4+ Th) exclusively
11.
STEM Geology Question 25: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Reverse fault caused by lateral compressional stress
Strike-slip fault with purely horizontal displacement
Normal fault resulting from crustal extensional (tensional) forces
Thrust fault with an inclination angle less than 45 degrees
12.
STEM Geology Question 26: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Thrust fault with an inclination angle less than 45 degrees
Strike-slip fault with purely horizontal displacement
Reverse fault caused by lateral compressional stress
Normal fault resulting from crustal extensional (tensional) forces
13.
STEM Genetics Question 17: What is the minimum number of tRNA anticodons required to translate an mRNA transcript containing 150 codons, terminating with a UAG stop codon?
150 tRNA molecules
75 tRNA molecules
149 tRNA molecules (stop codons do not code for amino acids or tRNAs)
151 tRNA molecules
14.
STEM Biology Problem 6: A double-stranded DNA segment contains 1,200 nucleotides, of which 240 are Adenine. What is the total number of Cytosine bases and hydrogen bonds in this segment?
360 Cytosine bases and 1,560 total hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
240 Cytosine bases and 1,200 hydrogen bonds
15.
STEM Endocrinology Question 2: A patient suffers from increased metabolic rate, weight loss, nervousness, and protruding eyes (exophthalmos). Which endocrine condition is most likely diagnosed?
Myxedema resulting from severe hypothyroidism in adults
Cushing's syndrome from elevated cortisol
Simple endemic goiter due to iodine deficiency
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
16.
STEM Endocrinology Question 12: A patient suffers from increased metabolic rate, weight loss, nervousness, and protruding eyes (exophthalmos). Which endocrine condition is most likely diagnosed?
Myxedema resulting from severe hypothyroidism in adults
Simple endemic goiter due to iodine deficiency
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
Cushing's syndrome from elevated cortisol
17.
STEM Geology Question 16: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Thrust fault with an inclination angle less than 45 degrees
Strike-slip fault with purely horizontal displacement
Normal fault resulting from crustal extensional (tensional) forces
Reverse fault caused by lateral compressional stress
18.
STEM Molecular Genetics Question 8: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
They mutate bacterial resistance genes permanently
They prevent plasmids from entering bacterial cells
They permanently destroy DNA ligase activity
19.
STEM Endocrinology Question 14: A patient suffers from increased metabolic rate, weight loss, nervousness, and protruding eyes (exophthalmos). Which endocrine condition is most likely diagnosed?
Simple endemic goiter due to iodine deficiency
Cushing's syndrome from elevated cortisol
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
Myxedema resulting from severe hypothyroidism in adults
20.
STEM Geology Question 44: Which type of geological fault is formed when hanging-wall rocks slide downward relative to the footwall under tensional stress?
Normal fault resulting from crustal extensional (tensional) forces
Thrust fault with an inclination angle less than 45 degrees
Reverse fault caused by lateral compressional stress
Strike-slip fault with purely horizontal displacement
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