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Curriculum and course: Biology

Curriculum and course: Biology

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Chapter 2 - Molecular Biology and Earth Science1 Annotated lessons + question banks and assessments

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Lesson 1 – Support and Movement in Living Organisms — Lesson quiz

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  • Questions count: 8
  • Passing grade: 60%
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1.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Lignin is immediately deposited inside the xylem vessel walls.
Cuticle thickness over leaf epidermis doubles within minutes.
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
Cell sap osmotic pressure increases and cell wall shrinks inward.
2.
During maximal skeletal muscle contraction according to Huxley's sliding filament model, which region experiences NO change in its absolute length?
The A-band (dark anisotropic zone)
The I-band (light isotropic zone)
The H-zone (central semi-light region)
The distance between two successive Z-lines
3.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
Sudden accumulation of glucose inside glycogen granules.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
4.
How many cervical vertebrae are present in the adult human vertebral column?
12 vertebrae
4 vertebrae
5 vertebrae
7 vertebrae
5.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Lignin is immediately deposited inside the xylem vessel walls.
Cuticle thickness over leaf epidermis doubles within minutes.
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
Cell sap osmotic pressure increases and cell wall shrinks inward.
6.
During maximal skeletal muscle contraction according to Huxley's sliding filament model, which region experiences NO change in its absolute length?
The A-band (dark anisotropic zone)
The I-band (light isotropic zone)
The H-zone (central semi-light region)
The distance between two successive Z-lines
7.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
Sudden accumulation of glucose inside glycogen granules.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
8.
How many cervical vertebrae are present in the adult human vertebral column?
12 vertebrae
4 vertebrae
5 vertebrae
7 vertebrae
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