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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 Genetics Question 16: 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
2.
STEM Biology Problem 20: 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?
240 Cytosine bases and 1,200 hydrogen bonds
360 Cytosine bases and 1,560 total hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
3.
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
4.
STEM Molecular Genetics Question 42: 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 prevent plasmids from entering bacterial cells
They permanently destroy DNA ligase activity
They mutate bacterial resistance genes permanently
5.
STEM Molecular Genetics Question 17: 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
6.
STEM Genetics Question 19: 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
7.
STEM Geology Question 35: 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
8.
STEM Geology Question 27: 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
Normal fault resulting from crustal extensional (tensional) forces
Strike-slip fault with purely horizontal displacement
Thrust fault with an inclination angle less than 45 degrees
9.
STEM Biology Problem 32: 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?
240 Cytosine bases and 1,200 hydrogen bonds
360 Cytosine bases and 1,560 total hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
10.
STEM Molecular Genetics Question 32: 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
11.
STEM Geology Question 17: 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
Reverse fault caused by lateral compressional stress
Thrust fault with an inclination angle less than 45 degrees
Strike-slip fault with purely horizontal displacement
12.
STEM Molecular Genetics Question 19: 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
13.
STEM Molecular Genetics Question 36: 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
14.
STEM Molecular Genetics Question 5: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They permanently destroy DNA ligase activity
They prevent plasmids from entering bacterial cells
They mutate bacterial resistance genes permanently
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
15.
STEM Molecular Genetics Question 16: 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
16.
STEM Geology Question 12: 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
17.
STEM Molecular Genetics Question 14: Why are sticky ends produced by restriction endonucleases essential for constructing recombinant DNA plasmids?
They permanently destroy DNA ligase activity
They prevent plasmids from entering bacterial cells
They mutate bacterial resistance genes permanently
They have single-stranded overhangs that readily form complementary hydrogen bonds with matching foreign DNA fragments
18.
STEM Biology Problem 34: 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
120 Cytosine bases and 960 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
240 Cytosine bases and 1,200 hydrogen bonds
19.
STEM Biology Problem 44: 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?
240 Cytosine bases and 1,200 hydrogen bonds
360 Cytosine bases and 1,560 total hydrogen bonds
120 Cytosine bases and 960 hydrogen bonds
480 Cytosine bases and 1,800 hydrogen bonds
20.
STEM Molecular Genetics Question 30: 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 permanently destroy DNA ligase activity
They prevent plasmids from entering bacterial cells
They mutate bacterial resistance genes permanently
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