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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 2 Quiz: DNA Structure, Replication and DNA Repair Enzymes

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1.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Hydrogen gas produced from the electrolysis of water
Pure carbon monoxide (CO) produced from metallurgical coke
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Carbon dioxide mixed with limestone
2.
Rotational cytoplasmic movement inside living plant cells (such as Elodea plants) is indicated by:
Movement of chloroplasts immersed in the cytoplasm stream in a constant rotational direction
Change in cell wall thickness
Mitochondrial division
Stomata open
3.
Auxins in plants (such as indole acetic acid (IAA)) are chemicals secreted from:
The growing tops and live plant buds are active and move to the response areas
Pollen granules only
Dead wood cells
Cork cells
4.
Natural killer (NK) cells attack and kill cancer cells and virus-infected cells by:
Histamine secretion
Secretion of antibodies
Secretion of specialized digestive enzymes without the need for prior specific antigen recognition
Swallow the cells whole
5.
The phenomenon of natural parthenogenesis in honey bees results in:
Female workers only
Bees are always male, and their somatic cells are haploid (1N) resulting from an unfertilized egg that grows mitotically.
Diploid males
Fertile queens (2N)
6.
Cultivation of plant tissues in a semi-natural nutrient medium (such as coconut milk) is scientific proof of:
Seeds are asexual
A complete living plant cell contains all the genetic information necessary to form a new complete plant
The necessity of double fertilization
Effect of thyroxine
7.
Artificial parthenogenesis in flowering plants (such as the production of seedless oranges or watermelons) is carried out by:
Irradiating seeds with X-rays
Tissue culture
Pen vaccination
Spraying flower stigmas with pollen extract or indole acetic acid to stimulate the ovary to form fruit without fertilization
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