Answer;
A. myofibrillar proteins in muscle.
Explanation;
Myofibrils are composed of long proteins including actin, myosin, and titin, and other proteins that hold them together.
These proteins are organized into thick and thin filaments called myofilaments, which repeat along the length of the myofibril in sections called sarcomeres.
Myofibrils are bundles of very fine fibers that almost fill the sarcoplasm of a muscle cell, while, Myofilaments (or filaments) are ultramicroscopic, thread-like structures found in myofibrils. In other words, the myofilaments are bundled together to make a myofibril.
B) shifts to a more electronegative atom.
C) increases its kinetic energy.
D) increases its activity as an oxidizing agent.
E) moves further away from the nucleus of the atom.
An electron loses potential energy when it moves further away from the nucleus of the atom (option E).
As an electron moves to a higher energy level or shell, it is farther from the positive charge of the nucleus, resulting in a decrease in potential energy. Conversely, when an electron moves closer to the nucleus or shifts to a lower energy level, it gains potential energy. The movement of electrons within an atom influences various chemical and physical properties, including bonding, reactivity, and spectral behavior.
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B.)behavioral isolation
C.)geographical isolation
D.)anatomical isolation
Answer:
behavioral isolation
Explanation:
B. The nucleus
C. The cytosol
D. The Golgi complex
E. The cell membrane
Answer:The correct option is C) Cell walls are rigid. Small molecules like water or oxygen can pass through them.
Explanation:
Cell walls are found in plant cells and some other organisms. They provide structural support and protection to the cell. The cell wall is made up of a rigid material called cellulose, which gives it its strength.
Cell walls are permeable, meaning that they allow certain substances to pass through them. Small molecules like water and oxygen can pass through the cell wall via small pores or channels. However, larger molecules, such as proteins and carbohydrates, cannot pass through the cell wall.
This selective permeability of the cell wall allows the cell to control the movement of substances in and out of the cell, maintaining its internal environment. It also helps prevent the cell from bursting under osmotic pressure.
In summary, cell walls are rigid structures composed of cellulose. They are permeable, allowing small molecules like water and oxygen to pass through, while blocking larger molecules.