Prokaryotes are organisms whose cells lack a nucleus and other organelles. ... Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm.
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Answer:
See explanation below.
Explanation:
Catabolism and anabolism are <u>both biochemical reactions that are part of important process of metabolism.</u>
Anabolic and catabolic pathways 'need each other,' that is, <u>the energy that is produced from catabolism is utilized by anabolism.</u>
Anabolic reactions use <u>simple molecules to build complex molecules</u>, whereas the role of catabolism is <u>to break the large molecules and transform them into smaller ones.</u>
<u>Example of Anabolism</u>
<em>Photosynthesis:</em>
- The reaction between CO2 and H2O to form glucose and oxygen.
<u>Example of Catabolism</u>
<em>Digestion:</em>
- Breaking down of large molecules to produce energy.
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Prions is a disease and are a family of rare progressive neurodegenerative disorders that affect both humans and animals.
Answer:
Spermatogenesis is stimulated by FSH acting on sertoli cells.
Explanation:
Spermatogenesis is the process by which spermatozoa grow and develop from germ cells into mature form. There are many hormones that are involved in this process and one of them is FSH (Follicle Stimulating Hormone). Another factor that play a vital role in the process are sertoli cells.
The FSH stimulates sertoli cells to release androgen-binding protein into the lumen portion of seminiferous tubules. The sertoli cells are the epithelial supporting cells that are located inside the seminiferous tubules. The sertoli cells are responsible for keeping the germ cells nourished and for extracting excess cytoplasm from newly formed spermatozoa cells just before they are released into the lumen of the seminiferous tublules.
Answer:
The correct answer is option B.
Explanation:
Homeostasis is the process or mechanism of trying to maintain equilibrium while interaction with the outside world. An example of maintaining homeostasis in the system level would be the endocytosis and exocytosis of a substance.
Endocytosis and exocytosis are the mechanisms in which molecules are brought into the cell and out of the cell depending on their need to the cell.
Thus, the correct answer is option B.
