Difference between gram positive and gram negative bacteria

1 answer:

5 0

Danish scientist Hans Christian Gram devised a method to differentiate two types of bacteria based on the structural differences in their cell walls. In his test, bacteria that retain the crystal violet dye do so because of a thick layer of peptidoglycan and are called Gram-positive bacteria. In contrast, Gram-negative bacteria do not retain the violet dye and are colored red or pink. Compared with Gram-positive bacteria, Gram-negative bacteria are more resistant against antibodies because of their impenetrable cell wall. These bacteria have a wide variety of applications ranging from medical treatment to industrial use and Swiss cheese production.

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What is the general process in which molecules move from an area of higher concentration to an area of lower concentration?

kiruha [24]

B.) Diffusion is the general process in which molecules move from an area of higher concentration to an area of lower concentration

Hope this helps!

3 0

3 years ago

Read 2 more answers

Large animals need specialized organs for gas exchange because ________. a volume increases more rapidly than surface area as si

mojhsa [17]

Answer:

b. they require more oxygen per unit of volume.

Explanation:

Large animals have a specialized organs for exhalation and inhalation of gases due to the requirement of large amount of oxygen for cellular respiration. Respiration is a process in which energy is released in the form of Adenine tri phosphate (ATP) in the mitochondria of the cell with the addition of oxygen. The waste product such as carbondioxide is produced which is removed from the body body through lungs.

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3 years ago

How a synthetic sponge mimics a live sponge to pick up dirt

natima [27]

The component would be known as a microfiber i think im not sure

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3 years ago

Scientist combine engineer skin in a laboratory to treat severe Burns and other types of skin injuries despite all engineer tiss

Xelga [282]

Answer:

mitosis

Explanation:

The cellular process that enables the cells to grow and develop into tissue is mitosis.

Mitosis involves the division of the vegetative cells of the body and is important for the growth and development of organisms as well as in the healing of wounds or the replacement of damaged cells/tissues.

Hence, in treating burns and other types of skin injuries, the cells of the skin are stimulated to divide rapidly by mitosis so as to replace the damaged cells due to the injury. By doing so, the injured area heals.

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3 years ago

Active transport and facilitied diffusion relation

statuscvo [17]

Answer:

Both facilitated diffusion and active transport are selective processes. Only selective molecules are allowed to cross the membrane. They utilize carrier proteins to move across the membrane.

Explanation:

Diffusion is the process by which molecules move across a membrane respective of the concentration gradient. The plasma membrane is a selectively permeable membrane which allows specific molecules to move across the concentration gradient.

Molecules migrate from a region of higher concentration to a lower concentration in case of diffusion. It can be classified into simple diffusion and facilitated diffusion. These are examples of passive transport.

In facilitated diffusion molecules move across the concentration gradient with the help of carrier proteins or channel proteins. The carrier proteins bind to the molecule which has to be transported and change conformation to allow it to cross the membrane. For example glucose molecule is carried across through GLUT transporter. Channel proteins open a channel inside the membrane and molecules get transported across the gradient.

Active transport carries molecules against the concentration gradient with the assist of energy. ATP hydrolysis is utilized to generate energy. As a result of active transport, the molecules are aggregated on one side of the membrane.

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3 years ago