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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 4 Quiz: Menstrual Cycle, Fertilization, Embryonic Development and Contraception

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  • Questions count: 20
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1.
STEM Molecular Genetics Question 40: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They prevent plasmids from entering bacterial cells
They mutate bacterial resistance genes permanently
They permanently destroy DNA ligase activity
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
2.
STEM Molecular Genetics Question 44: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They permanently destroy DNA ligase activity
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
3.
STEM Geology Question 42: 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
4.
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?
Simple endemic goiter due to iodine deficiency
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
Cushing's syndrome from elevated cortisol
Myxedema resulting from severe hypothyroidism in adults
5.
STEM Genetics Question 11: 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)
151 tRNA molecules
75 tRNA molecules
150 tRNA molecules
6.
STEM Endocrinology Question 26: 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
7.
STEM Geology Question 5: 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
8.
STEM Endocrinology Question 29: 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
Myxedema resulting from severe hypothyroidism in adults
Cushing's syndrome from elevated cortisol
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
9.
STEM Biology Problem 9: 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?
120 Cytosine bases and 960 hydrogen bonds
360 Cytosine bases and 1,560 total hydrogen bonds
240 Cytosine bases and 1,200 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
10.
STEM Endocrinology Question 13: 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
11.
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
240 Cytosine bases and 1,200 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
12.
STEM Geology Question 7: 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
Strike-slip fault with purely horizontal displacement
Reverse fault caused by lateral compressional stress
13.
STEM Biology Problem 23: 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
240 Cytosine bases and 1,200 hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
14.
STEM Immunology Question 8: Which immune cells are directly responsible for secreting perforin proteins and granzymes to lyse virally infected cells and tumor cells?
Helper T-cells (CD4+ Th) exclusively
Mast cells releasing histamine
Cytotoxic T-cells (CD8+ Tc) and Natural Killer (NK) cells
Plasma B-cells secreting IgG
15.
STEM Immunology Question 33: 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
Plasma B-cells secreting IgG
Mast cells releasing histamine
Helper T-cells (CD4+ Th) exclusively
16.
STEM Endocrinology Question 34: 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
Myxedema resulting from severe hypothyroidism in adults
Exophthalmic goiter (Hyperthyroidism caused by excessive thyroxine secretion)
17.
STEM Endocrinology Question 39: 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
18.
STEM Geology Question 25: 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
19.
STEM Molecular Genetics Question 28: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They prevent plasmids from entering bacterial cells
They mutate bacterial resistance genes permanently
They permanently destroy DNA ligase activity
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
20.
STEM Genetics Question 36: What is the minimum number of tRNA anticodons required to translate an mRNA transcript containing 150 codons, terminating with a UAG stop codon?
75 tRNA molecules
149 tRNA molecules (stop codons do not code for amino acids or tRNAs)
150 tRNA molecules
151 tRNA molecules
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