b. Anaphase
c. Metaphase
d. Prophase
Cells were first identified by Robert Hooke in 1665 when he observed the box-like structures in cork tissue under a microscope. In the 1670s, Antoine van Leeuwenhoek became the first to observe living cells. Both their work was instrumental to the understanding of cells and cell theory.
In 1665, experimental scientist Robert Hooke was the first to identify cells. He used the term 'cell' to describe the box-like structures he observed in a cork tissue using a lens, as documented in his publication Micrographic. Hooke's concept of a cell was based on his microscopic observation of the dead cork tissue. He likened the tiny subdivisions in the cork to the small rooms, or cells, that monks resided in.
Antoine van Leeuwenhoek, in the 1670s, became the first person to observe living cells, specifically bacteria and protozoa. Advances in lenses, microscope construction, and staining techniques throughout the years enabled the viewing of components within cells, further refining our understanding of cell structure and function.
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high phytoplankton turnover rate
b.
slow aquatic predator metabolisms
c.
small number of aquatic consumers
d.
high energy content of phytoplankton
Answer:
A is correct!
Explanation:
As the person above me says C is incorrect.
2. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains.
3. Phosphorylation always decreases the activity of the enzyme.
4. Proteins are usually phosphorylated at the N terminus of the chain.
5. Phosphorylation of proteins is catalyzed by phosphatases.
Answer:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains. Other statements are false. Thus, Option 2 is only true.
Explanation:
Proteins are usually phosphorylated at amino acids that have hydroxyl group- containing side chains which are Serine, Threonine and Tyrosine. Thus, the statement is true.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Therefore, the statement is false.
Phosphorylation can enhance or inhibit the activity of an enzyme but cannot activate enzymes. Thus, phosphorylation does not always decreases the activity of an enzyme.
Phosphorylation at the termini I.e., N terminus of a protein chain is relatively rare and usually involves other types of modification.
Phosphorylation of proteins is catalysed by enzymes called protein kinases. Thus, this statement is also false.
To know more about Phosphorylation,
Phosphorylation of proteins can either activate or inhibit protein function, depending on the specific context and the protein involved. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Phosphorylation is a common post-translational modification of proteins, where a phosphate group is added to specific amino acid residues. It is catalyzed by enzymes called kinases, which transfer a phosphate group from ATP to the target protein. Proteins can be phosphorylated at various amino acids, including serine, threonine, and tyrosine. This modification plays a crucial role in regulating protein function and cellular processes.
Contrary to statement 1, phosphorylation does not always activate enzymes. It can have diverse effects on protein activity, stability, localization, and interactions with other molecules. Depending on the specific context and the protein involved, phosphorylation can either activate or inhibit protein function.
Statement 2 is true. Proteins are usually phosphorylated at amino acids that have hydroxyl group-containing side chains, such as serine, threonine, and tyrosine.
Statement 3 is false. Phosphorylation does not always decrease the activity of the enzyme. It can have both activating and inhibitory effects on protein function.
Statement 4 is false. Proteins are not usually phosphorylated at the N terminus of the chain. Phosphorylation can occur at various amino acids throughout the protein sequence.
Statement 5 is false. Phosphorylation of proteins is catalyzed by enzymes called kinases, not phosphatases. Phosphatases are responsible for removing phosphate groups, reversing the phosphorylation.
Learn more about phosphorylation of proteins here:
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The pesticide is sprayed, and only those that can withstand it survive while the others perish. Those who can withstand it generate offspring who can withstand it.
Pesticides have the potential to pollute lawn, water, as well as other vegetation. Herbicides can be poisonous to a variety of different organisms in contrast to insects and plants, such as birds, fish, helpful invertebrates, and quasi plants. staying inside the rooms where bug sprays are being used or bringing inside household items designed for the outdoors.
Pesticides have the potential to pollute turf, water, soil, and other plant life. In addition to destroying weeds or insects, pesticides can be poisonous to a variety of other animals and plants, including fish, birds, beneficial insects, and non-target plants. residing in the areas where foggers are utilized or bringing indoor-use items inside your home. Any substance "designed for avoiding, eliminating, repelling, or reducing any pest" is referred to as a pesticide.
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yeast
penicillium
aspergillus
Rhizopus stolonifera
The correct answer is:
Penicillium
Aspergillus
The lesson states:
If you've ever heard of or taken penicillin to fight off an infection, you can thank a member of the imperfect fungi called penicillium. Some mold species of penicillium are also important in the flavoring and aging of cheese. Roquefort and Camembert cheese owe their distinctive flavors to these fungi. Aspergillus is an imperfect fungus that is found on decaying food. It also contributes to the production of organic acids like citric acid. Both penicillium and aspergillus produce enzymes that are purified and used in various industrial compounds and in medicine.