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Gelneren [198K]
2 years ago
7

When purified virulent pneumococci DNA was introduced to avirulent pneumococci, Avery and his colleagues observed _____. Multipl

e choice question. no death in test animals only growth of avirulent pneumococci, indicating DNA was NOT the agent of transformation death of test mice growth of virulent pneumococci, indicating DNA was the agent of transformation
Biology
1 answer:
Vikki [24]2 years ago
8 0

Answer:

death of test mice, growth of virulent pneumococci, indicating DNA was the agent of transformation

Explanation:

In an experiment conducted by three scientists namely: Oswald Avery, Colin MacLeod and Maclyn McCarty in 1944, it was proven that DNA is the substance that causes transformation in bacteria as opposed to proteins.

In this experiment, Avery and his colleagues combined a dead but virulent strain of Streptococcus pneumoniae & a living but avirulent strain of the same bacterium and inserted into a living rat. They found out that the test specimen (rat) died and observed the growth of the virulent pneumococci.

This suggests that the virulent strain of bacteria has transferred its virulent DNA via transformation into the avirulent strain to kill the rat. Hence, indicating DNA as the agent of transformation.

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Take a hypothetical bowl and add some water and some cooking oil and let the mixture settle. As you know, the mixture will separ
bazaltina [42]

Answer:

Phospholipid is the molecules that are amphipathic in nature means the molecule has both hydrophobic as well as hydrophilic regions. The phospholipids are the important constituent of the plasma membrane.

The water and oil gets separate when mix together. If the phospholipid is mixed with the oil and water solution than the oil part is mixed with the hydrophobic part and water will mix with the hydrophilic parts. They can form micelles together.

7 0
3 years ago
At what pH levels are enzymes in the human body productive?
fredd [130]

Answer:

Between ph7 and ph 11

Explanation:

The optimum pH level for this is at pH7 because the number achieved was 350 product molecules per Minute

4 0
2 years ago
Which carbohydrate and example pair are not correctly matched? glucose - monosaccharide starch - polysaccharide sucrose - disacc
Taya2010 [7]
Carbohydrate is a group of compounds that is comprised of very simple units of sugar called the monosaccharide. From the prefix "mono", this means that the simplest unit is composed only of one block of sugar. Monosaccharide examples include: glucose, galactose, and fructose. From the given lists above, the one that does not match perfectly is the fourth pair. Glycogen is a multibranched polysaccharide. 

ANSWER: glycogen - monosaccharide
3 0
3 years ago
What happens in Citric acid cycle?
V125BC [204]

Answer:

Explanation:

Cellular respiration generally involves breaking down of large organic molecules to release ATP (energy). Citric Acid cycle, also known as Kreb's cycle or Tricarboxylic acid cycle is the second stage of the cellular respiration (unique to aerobic organisms). Citric acid cycle occurs in the intracellular space or matrix of the mitochondria of eukaryotes.

Glycolysis, which is the first step of cellular respiration, produces pyruvate which is then converted to Acetyl CoA in order to enter the Kreb's cycle by first combining with oxaloacetate. Generally, citric acid cycle involves an eight-steps reaction consisting of series of reduction-oxidation, hydration, dehydration, decarboxylation reactions, with each step catalyzed by different enzymes.

In a nutshell, oxaloacetate is generated back at the completion of the cycle alongside 2 molecules of CO2, one GTP/ATP molecule and electron donors; NADH2 and FADH2. These reduced electron donors enter the third step of aerobic cellular respiration and act as the first electron donor in the Electron transport chain.

3 0
3 years ago
How does an increased population size affect the amount of competition between organisms?
zmey [24]
Competition will increased because more organisms will be competing for resources
5 0
2 years ago
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