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Helga [31]
2 years ago
10

Both passive and active transport are used to move molecules into and out of cells. True or False

Biology
1 answer:
erma4kov [3.2K]2 years ago
3 0

Answer: False

Explanation:

Active transport is the movement of molecules from a region of lower concentration to a region of higher concentration across the cell in a concentration gradient. It requires the use of energy .

Passive transport is the movement of molecules in and out of the cell from higher concentration to lower concentration without the use of energy.

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Muscular exercise presents a dramatic test of the body's homeostatic control systems because it results in large _____.
kicyunya [14]

Muscular exercise presents a dramatic test of the body's homeostatic control systems because it results in large amounts of heat production.

Homeostatic control systems- A body's physiological ability to maintain a steady internal environment in response to changes in the external environment is known as homeostasis.

Heat Production- The term "thermogenesis" refers to the process through which energy is lost by producing heat with specialization.

Energy- In biology, cells frequently store energy in macromolecules, especially lipids and carbohydrates (sugars). When chemical bonds are formed, such as during the redox reactions of cellular aerobic respiration, energy is released.

Redox Reactions- A reaction that happens when an oxidizing material and a reducing substance come into contact.

To know more about the homeostatic control system, click on the below link,

brainly.com/question/3913414

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7 0
1 year ago
A certain bacterial mRNA is known to represent only one gene and to contain about
Brut [27]

Answer:

C) 30,000

Explanation:

According to the given information, the bacterial mRNA consists of about 800 nucleotides. Three consecutive nucleotides together make one genetic codon which in turn codes for one specific amino acid in the protein encoded by this mRNA.  

So, an mRNA with 800 nucleotides will have total 800/3 = 266.67 or 266 genetic codes. The protein encoded by this mRNA would have a total of 266 amino acids.  

Given that one amino acid imparts 110 units to the molecular weight of the protein, the protein with 266 amino acids have the molecular weight= 266 x 110 = 29260, that is about 30,000.  

4 0
3 years ago
Multicellular organisms must be protected from the external environment. Because of this, cells of even the simplest multicellul
Vladimir [108]

Answer:

epithelial tissue

Explanation:

7 0
3 years ago
Read 2 more answers
Which protist is multicellular and can primarily be found in cool marine climates?
denis23 [38]
C
Brown algae
Im pretty sure this is correct
3 0
3 years ago
Read 2 more answers
Contact with infected cats and their feces is the only mode of transmission of Toxoplasma to humans. Contact with infected cats
Mkey [24]

Answer:

False

Explanation:

Toxoplasma is a congenital disease that is characterized by mild muscle aches, tender lymph nodes, etc. and in some immuno-compromised individuals, seizures and coordination loss may occur. I

The disease is caused by a protozoan known as <em>Toxoplasma gondii </em>and its infection is usually by eating foods (usually meats) that contain the cyst of the organism or making contact with cats that are infected in addition to infected mother-baby transmission, especially during pregnancy.

<em>Hence, humans can contract the organism not just by exposure to an infected cat but also by eating meats that contain the cysts of the organism.</em>

8 0
3 years ago
Read 2 more answers
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