Question

1)части клетки, которые были открыты с помощью световых микроскопов:а)ядро б) внешняя мембрана в) оболочка ядра г) цитопалзма 2)к клеточным органоидам относятся а) цитопоазма б) митохондрия в) рибосома г) ядро 3) первичная перетяжка хромосомы это а) хроматида б) центромера в) гистон г) метацентрическая хромосома

Answer 1

1) а
2) в, б, ( г может быть но надо ядро с ядрышками)
3) г

Answer 2

Parts of the Cell Visible with Light Microscopes:

a) Nucleus: The nucleus is a membrane-bound organelle that contains the cell's genetic material, DNA. It is often referred to as the control center of the cell. [[1]]

b) Cell Membrane: The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the cell. It separates the cell's internal environment from the external environment and regulates the movement of substances in and out of the cell. [[2]]

c) Nuclear Envelope: The nuclear envelope is a double membrane that surrounds the nucleus. It separates the nucleus from the cytoplasm and regulates the passage of molecules between the nucleus and the cytoplasm. [[3]]

d) Cytoplasm: The cytoplasm is the gel-like substance that fills the cell. It contains various organelles, cytosol, and other components necessary for cellular processes. [[4]]

Cell Organelles:

a) Cytoskeleton: The cytoskeleton is a network of protein filaments that provides structural support to the cell and helps maintain its shape. It is involved in cell movement, cell division, and the transport of organelles within the cell. [[5]]

b) Mitochondria: Mitochondria are membrane-bound organelles that are often referred to as the "powerhouses" of the cell. They generate energy in the form of ATP through cellular respiration. [[6]]

c) Ribosomes: Ribosomes are small organelles responsible for protein synthesis. They can be found either free in the cytoplasm or attached to the endoplasmic reticulum. [[7]]

d) Nucleus: The nucleus, as mentioned earlier, is the control center of the cell. It contains the cell's genetic material and is involved in regulating gene expression and cell division. [[1]]

Primary Chromosome Constriction:

a) Chromatid: A chromatid is one of the two identical copies of a replicated chromosome. During cell division, chromatids separate and become individual chromosomes. [[8]]

b) Centromere: The centromere is a specialized region of a chromosome that holds the two sister chromatids together. It plays a crucial role in chromosome segregation during cell division. [[9]]

c) Histone: Histones are proteins that help package DNA into a compact and organized structure called chromatin. They play a role in gene regulation and chromosome stability. [[10]]

d) Metacentric Chromosome: A metacentric chromosome is a type of chromosome with a centrally located centromere. It has two arms of equal length. [[11]]

I hope this information helps! Let me know if you have any further questions.