The following statement about cell cognition is incorrect .

Updated on educate 2024-04-06
9 answers
  1. Anonymous users2024-02-07

    The cells of nitrifying bacteria, molds, and sponges all contain ribosomes, DNA, and RNA

    Yes, most cells have ribosomes, they are all organisms with DNA as their genetic material, and those who have DNA have RNA).

    Cells that can perform aerobic respiration must contain mitochondria, and cells that contain mitochondria are undergoing aerobic respiration all the time.

    The previous sentence is true, but mitochondria do not undergo aerobic respiration all the time, for example, when the surrounding environment is hypoxic, mitochondria cannot perform aerobic respiration, but switch to anaerobic respiration in the cytoplasm).

    During a person's lifetime, the peak of cell analysis is in adolescence.

    Wrong, in the embryonic stage. )

    Cell differentiation results in differences in the genetic material of various cells, resulting in different morphologies and functions of cells.

    Wrong, cell differentiation cannot change the genetic material of the cell).

    Frog red blood cells, human brain cells, and onion apical meristem cells do not all have cell cycles, but the chemical components within these cells are constantly renewed.

    The previous sentence is true, the number of human brain cells is fixed and there is no cell cycle. But the latter sentence is wrong. The chemical composition cannot be renewed because the cell membrane is selectively permeable and selective to chemicals).

    So choose C

  2. Anonymous users2024-02-06

    Answer] :d plasmodesmata is a cytoplasmic connection that runs through the cell wall and communicates with neighboring plant cells, and is an important channel for intercellular material transport and information transmission. Glycoproteins on the outer surface of the cell membrane mainly play a role in recognition, but they are also involved in the protection, lubrication, and cell-to-cell adhesion of animal cells.

    If the glycoprotein content decreases, the cell capacity is easy to move, such as the cancer cells are easy to spread mainly due to the decrease in glycoprotein on their surface, item b is correct. The energy absorption reaction is generally associated with the hydrolysis reaction of ATP, while the exergonic reaction is accompanied by the synthesis of ATP, and the C term is correct. Sucone is a carbohydrate that is unique to plant cells and synthesized by plant cells. Lactose is a sugar that is unique to animal cells and synthesized by animal cells, and the D term is incorrect.

  3. Anonymous users2024-02-05

    Bacteria and fungi also have cell walls.

    b, centrosomes are also found in lower plant cells.

    c, the content of mitochondria is related to the vigorous metabolism of cells, such as cardiomyocytes contain more mitochondria than abdominal muscle cells.

    d, the parts of plants that do not see light generally have no chloroplasts, such as roots.

  4. Anonymous users2024-02-04

    The following statement about the structure of cells is correct (b).

    1.Although there are nuclear pores on the nuclear membrane, they are not fully permeable;

    2.Glucose is first broken down into pyruvate in the cytoplasmic matrix, which enters the mitochondria under aerobic conditions and continues to be decomposed.

  5. Anonymous users2024-02-03

    Answer: The C-cell theory was proposed by Schleiden and Schwann, so A is wrong; Viruses are non-cellular structures, so B is wrong; The cell theory reveals the unity of animal and plant cells, but not the diversity of cells. Answer C.

  6. Anonymous users2024-02-02

    Answer: dMitochondria are energy converters shared by animal and plant cells, and chloroplasts are only found in plant cells.

  7. Anonymous users2024-02-01

    What about the question? How can you end it without sending questions?

  8. Anonymous users2024-01-31

    Why is there only a question stem? What about the specific options?

  9. Anonymous users2024-01-30

    B interval chromosomes exist in a chromatin state.

    It is true that c has nuclear pores, and it is also true that it can transport specific macromolecules, but DNA cannot be transported. Generally, mRNA can be transported through nuclear pores.

    The difference is not only that there is no nuclear membrane, but that the eukaryotic nucleus also has a nucleolar structure, while the prokaryotes do not have this structure.

    So choose A.

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