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AP Biology Unit 2G: Osmoregulation & Membrane Dynamics — practice questions — page 3

Explore 86 free Unit 2G: Osmoregulation & Membrane Dynamics questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 2G: Osmoregulation & Membrane Dynamics questions and exercises with answers

Showing questions 61–86 of 86.

The basic structural and functional unit of all living organisms is the:Read the answer and worked solution →The cell cycle is conventionally divided into:Read the answer and worked solution →DNA replication occurs during which phase?Read the answer and worked solution →Mitosis produces:Read the answer and worked solution →Meiosis is the type of cell division that produces:Read the answer and worked solution →The phases of mitosis in correct order are:Read the answer and worked solution →At the end of S phase, each chromosome consists of:Read the answer and worked solution →The five sub-stages of prophase I of meiosis are:Read the answer and worked solution →In meiosis, the homologous chromosomes separate during:Read the answer and worked solution →During metaphase, chromosomes align at the:Read the answer and worked solution →In G2 of interphase, DNA content per cell relative to G1 is:Read the answer and worked solution →The synaptonemal complex is formed during:Read the answer and worked solution →A diploid cell with 2n = 8 undergoes meiosis. Number of chromosomes in each daughter cell after meiosis II completion:Read the answer and worked solution →The endocrine system uses ___ to coordinate body functions.Read the answer and worked solution →Thyroid hormones T3 and T4 contain which element?Read the answer and worked solution →Insulin is secreted by:Read the answer and worked solution →Hypothalamus secretes releasing and inhibiting hormones that act on:Read the answer and worked solution →Growth Hormone (GH) excess in childhood causes:Read the answer and worked solution →Cortisol secretion peaks in the:Read the answer and worked solution →Estrogen and progesterone, secreted mainly by ovaries during reproductive cycle, are:Read the answer and worked solution →Number of bivalents (paired homolog pairs) at metaphase I of a cell with 2n = 12:Read the answer and worked solution →DNA content at various cell cycle phases (C = haploid DNA content):Read the answer and worked solution →The scientist who first observed and described a living cell was:Read the answer and worked solution →Ribosomes are organelles that are:Read the answer and worked solution →A feature common to prokaryotes and many eukaryotes (e.g. plants, fungi) isRead the answer and worked solution →Cells that possess a membrane-bound, well-organised nucleus are called:Read the answer and worked solution →

Worked practice questions

The basic structural and functional unit of all living organisms is the:

  1. Tissue
  2. Molecule
  3. Atom
  4. Cell
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Correct answer: D. Cell

All living organisms — single-celled (bacteria, amoeba) and multicellular (plants, animals) — are made of cells. Cells perform all life functions (energy use, reproduction, response to environment). **The cell theory says:** (1) all living things are made of cells (2) cells come from pre-existing cells (3) the cell is the basic unit of structure and function.

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The cell cycle is conventionally divided into:

  1. Two stages
  2. Anaphase only
  3. Interphase (G1, S, G2) and M-phase (mitosis + cytokinesis)
  4. Just mitosis
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Correct answer: C. Interphase (G1, S, G2) and M-phase (mitosis + cytokinesis)

**Interphase:** G1 (cell growth, organelle synthesis), S (DNA replication), G2 (preparation for mitosis). **M-phase:** mitosis + cytokinesis. Interphase is ~95% of the cycle in a typical mammalian cell.

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DNA replication occurs during which phase?

  1. S phase (synthesis)
  2. G1
  3. G2
  4. M phase
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Correct answer: A. S phase (synthesis)

S phase = DNA Synthesis. The genome is replicated semiconservatively. At the end of S, each chromosome consists of 2 sister chromatids joined at centromere. DNA content doubles from 2C to 4C.

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More Biology topics

Unit 5C: Non-Mendelian Genetics & Population TransmissionUnit 2B: Membrane Transport, Tonicity & Cell SizeUnit 8K: Human Organ Systems & HomeostasisUnit 3B: Photosynthesis, Respiration & Cellular EnergyUnit 7B: Population Genetics & Hardy-Weinberg EvolutionUnit 8R: Environmental Pollution & Organismal HealthUnit 5D: Organismal Reproduction & Life CyclesUnit 6B: Transcription, Translation & Gene Expression