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lutik1710 [3]
3 years ago
14

Melissa is studying a Gram-stained slide of curd bacteria. She sees many rod-shaped, violet-colored bacteria. What type of bacte

ria are they?
Biology
2 answers:
aleksandrvk [35]3 years ago
8 0
Rod shaped = bacilli
Purple =Gram positive
The bacteria is Lactobacillus
Mashcka [7]3 years ago
3 0

Answer:

By the observation, the rod shape violet-colored bacteria could be a Gram-positive bacillus which is <em>Lactobacillus spp</em>.  in curd.

Explanation:

Gram-stain is a staining method to isolate and study the Gram-positive or Gram-negative bacteria with the help of the crystal violet dye. Crystal violet dye stains both Gram-positive and Gram-negative bacteria in purple stain. After decolorization, Gram-negative bacteria appears to be pink in color, however,Gram-positive bacteria remain purple.

According to bacteria structure, they term as bacillus (rod), strepto (clusters or threads) or Diplo (in pairs).

Thus, according to the observation, the rod shape violet colored bacteria are Gram-positive bacillus which is <em>Lactobacillus spp</em>. in curd.

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Which lipoprotein carries cholesterol to the cells in your body, but can get stuck in arteries while traveling in the blood, dep
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LDL (low-density lipoprotein) carry cholesterol from the liver to the tissues and can contribute to the formation of plaque that builds up in the arteries.

<h3>What are lipids?</h3>

Lipids are soluble in fat and to circulate in the blood, which is an aqueous medium, they form lipoprotein complexes called lipoproteins, these constitute a transport medium and circulating reservoir for lipids.

<h3>Characteristics of LDL (low-density lipoprotein)</h3>

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  • LDL, composed mainly of cholesterol, when in excess, also deposits it on the walls of the arteries, contributing to the formation of plaque.

Therefore, we can conclude that excess LDL (low-density lipoprotein) poses a health risk because it facilitates the accumulation of fat in the arteries.

Learn more about lipoproteins here: brainly.com/question/16170788

5 0
2 years ago
The kerbs cycle is considered a cycle because
Lady_Fox [76]

Answer:

It is a cycle because oxaloacetic acid is the exact molecule needed to accept an acetyl-CoA molecule and start another turn of the cycle.

8 0
3 years ago
Read 2 more answers
A change in a given direction causes change in the opposite direction.
Marrrta [24]

Answer:

Negative Feedback

Explanation:

Negative feedback is a stimulus that cause the system to move in the opposite direction of what has happening.  For example if your are cold, you will shiver in order to create heat that will cause your body temperature to increase.   But if you are hot you will sweat which will cause your body temperature to decrease.  

6 0
3 years ago
how would you use the scientific method to answer this question: do mice live longer when they are fed high-sugar diets
Zielflug [23.3K]

Answer:

The question: Do mice live longer when they are fed high sugar diets?

Hypothesis: There are two hypothesis the null hypothesis which we assume is correct, it states that a high sugar diet will have no effect on the life span of a mouse and an alternate hypothesis that we accept if evidence shows that sugar does increase the life span if mice. It says a high sugar diet does incerease the life span of mice.

Prediction: Assume that the null hypothesis is correct. High sugar diets will not increase the life span of the mice.

Collect data through experimentation. Use some mice as a 'control'. These mice will not undergo any changes but will be kept for comparison. Expose some other mice to high sugar diets and the compare the outcome with the 'control' mice.  

Analyzing: From the experiment this you can choose which hypothesis you are going to accept. I.e. null: no change or alternate: there was a change and do some extra research to back up your hypothesis.

Hope this helps :)

8 0
3 years ago
A possible reaction for the degradation of the pesticide DDT to a less harmful compound was simulated in the laboratory. The rea
Bas_tet [7]

Answer:

This exercise is incomplete, missing the value of k (decay constant), which is equal to 4x10⁻⁸s⁻¹ at 25°C

The answer is 0.549 years

Explanation:

Given:

first order of reaction

k = 4x10⁻⁸s⁻¹

For a first order of reaction, the half-life time for the degradation of DDT is equal to:

t=\frac{0.693}{k} =\frac{0.693}{4x10^{-8} } =17325000s=0.549years

8 0
3 years ago
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