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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: Support in Plants and the Human Skeletal System

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  • Questions count: 14
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1.
The electronic configurations of both Chromium (24Cr) and Copper (29Cu) are anomalous due to the enhanced stability associated with:
Completely empty 4s subshells
High electronegativity differences
Half-filled (3d5) and completely filled (3d10) d-subshells respectively
Pairing of all electrons in the outer valence level
2.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
Iron(II) sulfate and hydrogen gas only
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
Elemental iron and sulfur dioxide
Iron(III) sulfate only
3.
Physiological bracing is considered a temporary bracing because:
It depends entirely on the movement of water through osmosis and disappears when it is lost by dehydration
Limited only to old leaves
She disappears into the darkness
It relies on the deposition of permanent chemicals
4.
Which of the following structures represents the mechanical link that connects the gastrocnemius muscle to the heel bone?
Achilles tendon
Posterior cruciate ligament
Meniscus
Sarcoma membrane
5.
The Achilles tendon differs from the cruciate ligaments in the knee joint in that:
The tendon is very flexible and stretchable, while the ligament is rigid and does not bend
The tendon is devoid of collagen fibers
The ligament transmits the force of muscle contraction
A tendon connects a muscle to a bone, while a ligament connects one bone to another
6.
Complete rupture of the Achilles tendon in an athlete requires treatment:
Take calcium and vitamin D tablets
Trigeminal muscle resection
Surgical intervention to suture both ends of the tendon and give anti-inflammatory and analgesic agents
Apply cold water compresses only
7.
Painful and sudden muscle tension often occurs as a result of a severe deficiency in:
Lactic acid
Vitamin C
ATP molecules needed to separate cross-links from actin filaments
Carbon dioxide gas
8.
According to Huxley's sliding filament theory, when a muscle fiber contracts completely:
The length of the myosin filaments doubles
Z lines diverge
The length of the illuminated area (I) increases
The semiluminal area (H) is absent or disappears, the length of the muscle segment is shortened, and the Z lines converge
9.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
The largest gland by weight
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
Connected to the liver
Secretes digestive enzymes
10.
When the parathyroid glands are accidentally removed completely during thyroid surgery, the patient will develop symptoms of:
Painful muscle spasms and a severe increase in irritability and anger due to severe calcium deficiency
Severe low blood pressure
Diabetic coma
High blood calcium
11.
Monocytes are functionally capable of leaving the bloodstream when needed:
Transformation into B cells
Histamine secretion
Antibody formation
Transform into active macrophages to engulf microbes and cellular debris
12.
The apple is considered a false fruit from a morphological and anatomical perspective because:
Produced from a hermaphrodite flower
It is made without seeds
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
The cup leaves become greasy
13.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
pepsin enzyme
Ribonuclease enzyme
Deoxyribonuclease enzyme
DNA polymerase enzyme
14.
The enzyme extracted from RNA viruses and used to convert mRNA into a single strand of complementary DNA (cDNA) is:
Reverse transcriptase
Ligase enzyme
Palace enzyme
RNA polymerase enzyme
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