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2 years ago

Agar is an important component of media because A. bacteria require agar to grow.

Biology

1 answer:

Alik [6]2 years ago

3 0

C. Agar provides a solid surface for bacterial growth.

Agar is a substance obtained from red algae which when added to a culture media, provides a solid surface for the growth of bacteria. When the agar is not added then the culture media remains as the broth and when the agar is added then the broth gets solidified.

Agar is added 1.5-2% in the broth to get solidified. The growth of the bacteria depends on the amount of agar added. Agar is used for the growth of bacteria because it has gel like properties which holds the nutrients evenly and the bacteria can use it accordingly.

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What type of bond holds the nitrogen bases together across the DNA's two

stich3 [128]

Answer:

Hydrogen

Explanation:

2 between A-T and 3 between G-C

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2 years ago

Proteins provide transport through the cell

Katen [24]

D. Enzymes and antibodies

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2 years ago

What is the difference between phenotypes and genotypes

Nonamiya [84]

Phenotypes are the physical makeup of a living thing and genotypes are the genetic makeup of the living thing

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2 years ago

Read 2 more answers

Part D - The effect of gramicidin on oxidative phosphorylation When the protein gramicidin is integrated into a membrane, an H c

Andrews [41]

Answer:

The correct answer would be -

Remains the same: proton pumping rate, electron transport rate, rate of oxygen uptake.

Decreases or goes to zero: rate of ATP synthesis, size of protein gradient

Explanation:

An H+ channel forms and the membrane becomes very permeable to protons if the protein gramicidin is integrated into a membrane. If gramicidin is added to an actively respiring muscle cell, it will affect the in the following manner:

Remains the same:

proton pumping rate, electron transport rate, rate of oxygen uptake.

Decreases:

rate of ATP synthesis, size of protein gradient

None of these will show an increase due to the addition of gramicidin tlo actively respiring muscle cells.

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2 years ago

Describe the Watson and Crick model of DNA structure. How did it fit the data provided by Chargaff and the X-ray diffraction pat

icang [17]

DNA model given by Watson and Creek in the year of 1953 gave a very detailed study regarding the structure of B DNA which is valid till date and is essentially corroborating with Chargaff's data and Xray diffraction pattern.

<h3><u>Explanation:</u></h3>

The DNA is the most common nucleic acid found in the living organisms as a genetic material. As stated by Watson and Creek, this DNA contains a double helical structure with two sugar phosphate backbones and the nitrogen bases getting projected from it inwards. The backbones are formed of ribose sugar and phosphate and joined together with a phosphodiester bond. The ribose sugar is attached to phosphates at its 3' and 5' Carbon atoms. The nitrogen bases found in DNA are Adenine, Guanine, Thymine and Cytosine. The Adenine has two hydrogen bonds with thymine and guanine has 3 hydrogen bonds with cytosine.

Each full turn of a helix is 34A and each base pair is 3.4A apart. The distance between two strands of DNA is 20A.

Chargaff's rule regarding the equal amount of adenine and thymine as well as guanine and cytosine is matching with this structure. All the other rules also do match with this DNA structure.

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2 years ago