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yKpoI14uk [10]
4 years ago
5

When a cell is placed in a hypotonic solution?

Biology
1 answer:
Anika [276]4 years ago
6 0
Water moves in; expands
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On the electromagnetic spectrum,
Bas_tet [7]
<span>C. less energy than X-rays and gamma rays.

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4 years ago
What are chemicals used to soften polyvinyl chloride (PVC) plastic found in a variety of products, such as detergents, cosmetics
ASHA 777 [7]

Answer:

The correct answer is option B, that is, phthalates.

Explanation:

A class of chemicals that are used to soften plastics like PVC, function as fixatives and solvents and bind fragrances in the products are known as phthalates. The human encountering with the chemicals can take place via:  

1. Inhalation of fragrances or fumes from fixatives and solvents,  

2. Chewing on a plastic toy by a child that develops small openings in the plastic, which provides a space for the chemical to get leached from the toy into the mouth of the child.  

3. Through the absorption of perfumes, lotion, and deodorants.  

The serious health effects of the chemicals comprise developmental and reproductive issues, hormone disruption, low sperm count, asthma, undescended testes, preterm birth, premature puberty, and development of certain kinds of cancers.  

5 0
3 years ago
Imagine that a toxin is introduced to the body and inhibits the establishment of the proton gradient in the intermembrane space.
jarptica [38.1K]

Answer:

ATP synthase would be unable to produce ATP

Explanation:

ATP synthase depends on the proton gradient in the intermembrane space to enable it to produce ATP. As a consequence of this, the toxin will make it inactive. Oxidative phosphorylation is now inhibited in this case, as opposed to substrate-level phosphorylation.

Pyruvate is a product of glycolysis, and it will not be affected by a toxin. NADH is very important in the establishing of a proton gradient, so it is expected that it would be unable to be oxidized due to the toxin. Protons produced in the conversion of NADH to NAD+ actually establish the proton gradient. If the gradient is absent, NADH is then not likely to be oxidized.

3 0
3 years ago
Penicillin-binding protein 2a, encoded by the medA gene, isn’t affected by beta-lactam antibiotics.
Flauer [41]

Answer:

The correct answer is - false.

Explanation:

Penicillin-binding protein 2a or PBPs are protein produced by bacteria that binds with the β-lactam antibiotics such as penicillin. They play role in the cell wall synthesis of bacteria by producing peptidoglycan by catalyzing the reaction.

β-Lactam antibiotics bind with the PBPs and cause the disruption to peptidoglycan cross-linking in the biosynthesis of the cell wall and ultimately lysis of bacteria takes place and cell death.

7 0
3 years ago
Chum salmon (Oncorhynchus keta) are born in freshwater environments and then migrate to the sea. Near the end of their lives, th
lyudmila [28]

Answer:

Acclimatization

Explanation:

Acclimatization is the change in the body of an organism in response to changes in the environment to maintain equilibrium (homeostasis). In the case of the salmon, when the environment changes from fresh to salt water and back, the chemical homeostasis would be altered if the fish didn't adjust. The adjustments in the fish gills are the response of the fish to acclimatize to the changes in the chemical environment in order to maintain homeostasis.

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