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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: Asexual and Sexual Reproduction and Alternation of Generations

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  • Questions count: 10
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1.
The second derivative d2y/dx2 of the function y = x4 - 2 x3 + 5 is:
12 x2 - 6 x
12 x2 - 12 x
4 x3 - 6 x2
24 x - 12
2.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
To prevent solar radiation from penetrating the foundation
To reduce the gravitational pull of the bedrock
To allow fish to swim upstream through drainage gates
3.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
6 rho (since rho is proportional to P / T)
1.5 rho
3 rho
0.67 rho
4.
Telomeres are found at the ends of eukaryotic chromosomes and perform an important function in:
Synthesis of enzymes
Centromere doubling
Construction of ribosomes
Protecting chromosomes from corrosion and merging with each other and maintaining their structure
5.
The Ancon breed mutation in sheep with short, arched legs is considered a mutation:
A useful mechanism that the breeder kept in mind to prevent sheep from jumping fences and damaging crops
Harmful innovation
Numerical chromosome
Fatal to fetuses
6.
Stop codons that bind to the release factor to terminate the translation process are:
UAA And UAG and UGA
AAA And UUU and GGG
AUG And GUG and UUG
CCC And GGG and TTT
7.
The polyadenyne tail (Poly-A Tail) added to the end of the mRNA molecule in eukaryotes consists of about 200 adenine nucleotides and functionally functions to:
Encoding polar amino acids
Formation of the nuclear envelope
Protecting the mRNA molecule from degradation by enzymes in the cytoplasm
Binding to the polymerase enzyme
8.
The number of amino acid molecules in a polypeptide chain resulting from mRNA translation consisting of 303 nucleotides, including the start and stop codons, is equal to:
300 Acid
101 Acid
100 Amino acid
99 Acid
9.
The two main functional sites on the tRNA molecule are:
The amino acid binding site is at the 3′ end' (sequence CCA), and anticodon site
Phosphate site and sugar site
DNA polymerase site and binding site
Start location and stop location
10.
Polyribosome is a vital cellular structure consisting of:
Accumulated peripheral granules
A large number of ribosomes (up to 100 ribosomes) attach to a single mRNA molecule to translate it simultaneously and quickly build many copies of the protein.
Mitochondrial aggregation
Fusion of two nuclei
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