Answer:
Fungi are eukaryotic organisms; i.e., their cells contain membrane-bound organelles and clearly defined nuclei. ... Fungi grow from the tips of filaments (hyphae) that make up the bodies of the organisms (mycelia), and they digest organic matter externally before absorbing it into their mycelia.
Answer:
B
Explanation:
All cells from the body came from a single cell ( fertilization of egg and sperm). All the cell have the same instruction in them. They however undergo certain changes base on the site of their function in process described as cell specialization. During this differentiating process, certain genes are activated to produce proteins that enables specific functions. Example include the myosin present in abundance in muscle cells but not in lens cell while the lens cell have crystallins in abundance for it adapted activities which the muscles cells lack. others include the root hair cell specially adapted for absorption, the nerve cells for transmission of electrical impulses. This cells generally have certain character controlled by the activated genes which are repressed in others.
Answer: True,
Small amounts of hormones have large effects on an organism because the signals are amplified between glands and tissues due to the second messenger systems.
explanation:
Second messemgers are the intracellular molecules which are activated by the extracellular molecules. Second messengers intracellulary triggers physiological changes such as proliferation differentiation migration etc.
When hormones are released they bind to specific receptors such as G-coupled recptors,tyrosine recpetor which when activated further activates second messengers such as cAMP and STAT respectively.
These second messengers amplify the hormone secretion and production by phosphorylation and increasing transcription.
Hence this is true that second messnegers amplify the hormones and their physiological results.
Answer:
A single phospholipid molecule has a phosphate group on one end, called the “head,” and two side-by-side chains of fatty acids that make up the lipid “tails. ” The phosphate group is negatively charged, making the head polar and hydrophilic, or “water loving.” The phosphate heads are thus attracted to the water.
Explanation:
Answer:
The correct answer is - Protein hormones are synthesized on free ribosomes (false).
Explanation:
The majority of the hormones that are produced from endocrine glands are produced are steroids however some of the hormones are made up of peptide or proteins.
Protein hormone synthesis uses RNA, is a copy of the gene for this hormone, this is packaged into vesicles with the help of ER and Golgi bodies for movement through the cell and reaches to its target cell by traveling through the bloodstream. mRNA is transcribed from DNA in order to produce protein. These hormones are produced according to the mRNA coding from amino acids in the cell.
