1.
What is the defintion of cell wall?
Correct Answer
A. A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.
Explanation
The correct answer is "A rigid layer of nonliving material that surrounds the cells of plants and some other organisms." This definition accurately describes the cell wall, which provides structural support and protection to the cell. It is composed of various materials such as cellulose in plants and chitin in fungi. The cell wall also helps regulate the movement of substances in and out of the cell.
2.
What is the defintion of chloroplasts?
Correct Answer
B. A structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food.
Explanation
Chloroplasts are organelles found in the cells of plants and some other organisms. They are responsible for capturing energy from sunlight through a process called photosynthesis and using that energy to produce food in the form of glucose. This answer accurately describes the function and purpose of chloroplasts.
3.
What is a vacuole.
Correct Answer
B. A sac inside a cell that acts as a storage area.
Explanation
A vacuole is a sac inside a cell that acts as a storage area. It is responsible for storing various substances such as water, nutrients, and waste products. Vacuoles also play a role in maintaining the cell's shape and structure, as well as regulating the internal pressure of the cell. They can vary in size and function depending on the type of cell and organism.
4.
What is the defintion of Mitochondria.
Correct Answer
B. Rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions.
Explanation
Mitochondria are rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions. They are responsible for producing ATP, the main source of energy for cellular activities. Mitochondria have their own DNA and are believed to have originated from ancient bacteria that formed a symbiotic relationship with eukaryotic cells. This explanation accurately describes the function and characteristics of mitochondria.
5.
Is the cell membrane a animal cell a plant cell or both?
Correct Answer
B. It is both
Explanation
The cell membrane is present in both animal and plant cells. It is a thin, flexible barrier that surrounds the cell and separates the internal environment from the external environment. It controls the movement of substances in and out of the cell, helps maintain cell shape, and provides protection. Therefore, the statement "It is both" is correct as it acknowledges that the cell membrane is found in both animal and plant cells.
6.
Cytoplasm is the the region between the and the nucleus; in organisms without a nucleus, the region located inside the cell membrane
Correct Answer
cell membrane , cell wall, lysosomes
Explanation
The given answer is correct because it accurately lists the components that are mentioned in the explanation. The explanation defines the cytoplasm as the region between the cell membrane and the nucleus in organisms with a nucleus, and as the region located inside the cell membrane in organisms without a nucleus. It also mentions the cell membrane, cell wall, and lysosomes as components. Therefore, the answer correctly includes these components mentioned in the explanation.
7.
The defintion of nucleolus is ?
Correct Answer
A. The nucleolus is the part of the nucleus containing most of the genes that code for the synthesis of ribosomal .
Explanation
The nucleolus is a part of the nucleus that contains most of the genes responsible for synthesizing ribosomal RNA. It is involved in the production and assembly of ribosomes, which are responsible for protein synthesis in the cell. The nucleolus is a dense area within the cell that contains nucleic acids, the chemical instructions that direct the cell's activities. It plays a crucial role in the regulation of cellular processes and is essential for the proper functioning of the cell.
8.
What is endoplamsic reticulum?
Correct Answer
A. A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another.
Explanation
The endoplasmic reticulum is a cell structure that forms a maze-like network of passageways within the cell. It is responsible for the transportation of proteins and other materials from one part of the cell to another. This structure plays a crucial role in protein synthesis and the proper functioning of the cell.
9.
Ribosomes are......
Correct Answer
A small grain—like structure in the cytoplasm of a cell where proteins are made.
, A cell in the blood that takes up oxygen in the lungs and delivers it to cells elsewhere in the body.
Explanation
Ribosomes are small grain-like structures in the cytoplasm of a cell where proteins are made. They are responsible for protein synthesis and play a crucial role in the production of proteins, which are essential for various cellular functions. Ribosomes are not cells in the blood that take up oxygen and deliver it to cells in the body. This is the function of red blood cells, not ribosomes.
10.
A lysosome is............
Correct Answer
A small, round cell structure containing chemicals that break down large food particles into smaller ones.
, White blood cell that distinguishes between each kind of pathogen.
11.
The defintion of Golgi bodies is ......
Correct Answer
A. A netlike structure in the cytoplasm of animal cells
Explanation
Golgi bodies, also known as Golgi apparatus, are organelles found in the cytoplasm of animal cells. They are responsible for the processing, packaging, and distribution of proteins and lipids within the cell. The Golgi apparatus has a netlike structure, composed of flattened sacs called cisternae, which are interconnected. This structure allows for the efficient sorting and modification of molecules before they are transported to their final destinations within the cell or outside of it.
12.
What is a nucleur envelope..............
Correct Answer
A. The double membrane surrounding the nucleus within a cell.
Explanation
The nuclear envelope is a double membrane that surrounds the nucleus within a cell. It separates the contents of the nucleus from the cytoplasm and controls the movement of molecules in and out of the nucleus. The outer membrane of the nuclear envelope is continuous with the endoplasmic reticulum, while the inner membrane is lined with nuclear lamina, which provides structural support to the nucleus. The nuclear envelope also contains nuclear pores, which regulate the transport of molecules such as proteins and RNA between the nucleus and the cytoplasm.
13.
Is the cell wall a plant cell, animal cell or both?
Correct Answer
B. Plant cell
Explanation
The cell wall is only present in plant cells. It is a rigid structure made up of cellulose that surrounds the cell membrane. It provides support and protection to the plant cell, helping it maintain its shape and preventing it from bursting under pressure. Animal cells do not have a cell wall, instead they have a flexible cell membrane that allows for movement and flexibility. Therefore, the correct answer is plant cell.
14.
What are the small structures inside the cell?
Correct Answer
A. Organelles
Explanation
Organelles are small structures inside the cell that perform specific functions. They are like tiny organs within the cell, each with its own role and purpose. Examples of organelles include the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus. These structures are essential for the cell's survival and functioning. Cell walls and cell membranes, on the other hand, are not considered organelles. Cell walls provide support and protection to plant cells, while cell membranes regulate the movement of substances in and out of the cell.
15.
Mitochondria is rod shaped.
Correct Answer
A. True
Explanation
Mitochondria are indeed rod-shaped organelles found in most eukaryotic cells. They are responsible for producing energy in the form of ATP through a process called cellular respiration. The shape of mitochondria allows for a larger surface area, which enhances their ability to carry out their functions efficiently. Additionally, the rod shape allows mitochondria to move and distribute themselves throughout the cell as needed. Therefore, the statement "Mitochondria is rod-shaped" is true.
16.
Plant cells are found in cytoplasm.
Correct Answer
B. False
Explanation
Plant cells are not found in the cytoplasm. The cytoplasm is a gel-like substance that fills the cell and contains various organelles, including the nucleus, mitochondria, and ribosomes. Plant cells, like all eukaryotic cells, have a cytoplasm, but they also have additional structures such as a cell wall, chloroplasts, and a large central vacuole, which are not found in animal cells. Therefore, the statement that plant cells are found in the cytoplasm is incorrect.