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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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  • Questions count: 9
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1.
The hormone responsible for maintaining the balance of minerals in the blood by stimulating the reabsorption of sodium ions and eliminating excess potassium through the kidneys is:
Aldosterone
Thyroxine hormone
Insulin hormone
Cortisol hormone
2.
The two hormones that are secreted from the mucous membrane of the small intestine to stimulate the pancreas to secrete its digestive juices are:
Secretin and cholecystokinin (Secretin & CCK)
Prolactin and oxytocin
Thyroxine and calcitonin
Insulin and glucagon
3.
Beta cells in the islets of Langerhans in the pancreas are responsible for secreting the hormone:
Glucagon
Pepsin
Insulin
Somatostatin
4.
The cells that suppress and inhibit the immune response after eliminating the microbe and secrete lymphokine proteins are:
Helper T cells (Th)
Plasma cells
Neutrophil cells
Suppressor T cells
5.
Vaccination gives humans immunity:
Temporary negativity that disappears within weeks
Acquired long-term positivity for the formation of memory cells
Not specialized
Innate, inherited
6.
The apple is considered a false fruit from a morphological and anatomical perspective because:
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
Produced from a hermaphrodite flower
It is made without seeds
The cup leaves become greasy
7.
Double fertilization in flowering plants involves two fusions:
Fusion of petals with sepals
Chromosome duplication in Takht cells
The fusion of the zygote nucleus (N) with the egg nucleus (N) to form the zygote (2N), and the fusion of the second nuclei (N) with the two polar nuclei (2N) to form the sperm nucleus.Dosperm (3N)
The fusion of two pollen grains with one egg
8.
Common and economically beneficial chromosome duplication in the plant kingdom (such as strawberries, wheat, and apples) leads to:
Loss of chlorophyll
Plant sterility and death
Larger cells and tissues and larger, sweeter and more productive fruits
Root loss
9.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Colchicine, mustard gas, or nitrous acid
Sucrose solution
Glycerin
Hyaluronic acid
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