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4 years ago

Scientists studying transcription in yeast (Saccharomyces cerevisiae) created an experimental strain that

Biology

1 answer:

Ray Of Light [21]4 years ago

8 0

Answer:

Explanation:

Hello!

The scientist created an experimental strain that produces a modified RNA polymerase with a single amino acid substitution. This mutation is supposed to change the elongation rate of the mRNA during transcription.

The dependent or response variable, is the one the researchers are interested in, meaning, are the characteristics that the researcher will pay attention to and measure during the experiment.

In this example, the researcher is interested in testing the max elongation rate during transcription, which is the dependent variable of this experiment.

In the second part of the experiment, both strains of yeast, wilds, and experimental, where exposed to 40ug/mL solution of amanitin and recorded the maximum elongation rate of the RNA. This is naturally to test the effects of amanitin over the elongation rate of the mRNA in both strains.

The control group is a set of experimental units that are exposed to the same conditions as the experimental groups, with the exception that they receive no treatment (or they receive a "no effective" treatment often called a placebo). The purpose of a control group is to know the natural response of the experimental units to a treatment-free environment, this way when comparing both groups, the researcher will be able to observe the differences or changes due to the applied treatments.

In the second experiment, there are missing two control groups, one made of the wild strain and the other made of the experimental strain, exposed to the same conditions as the treated strains.

I hope this helps!

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An inherited characteristic that gives an organism an advantage

kherson [118]

Natural selection: organisms with certain inherited traits that are more likely to survive and reproduce than others.

These favorable traits can give an organism an advantage by giving them a higher chance of survival and reproduction. Darwin called this, "survival of the fittest"

5 0

4 years ago

Two dihybrid pea plants (both tall and with purple flowers) are mated. The cross resulted in 9866 progeny, of which 5550 were ta

d1i1m1o1n [39]

Answer:

<h2>616 Short with white flower </h2><h2>1850 Tall with white flower </h2><h2>1850 Short with purple flower</h2>

Explanation:

A dihybrid cross is in which two genes of two different traits are crossed

As given, two dihybrid pea plants (tall with purple flower) are mated, resulting 5550 out of 9866 were tall with purple.

T= tall

t= short,

P= purple,

p= white;

So genotype of parents are TtPp ; T is dominant over t, P is dominant over p.

Crossing between two parens= TtPp × TtPp

so gamets are = parent 1: TP, Tp, tP, tp and parent 2: TP, Tp, tP, tp

Hence the four different gametes formed.

Now arrange the gametes on the top and left side of a Punnett square it'll genotypically results into different combinations, by which phenotypic ratios can be calculated.

offspring are = TTPP, TTPp, TtPP, TtPp....................TTpp, Ttpp.....ttPP, ttPp.......ttpp

(T_P_)= Tall with purple flower,

(T_pp)= tall with white flower,

(ttP_)= short with purple flower,

(ttpp)= short with white flower.

so it show 12:3:3:1 ratio'

Phenotypic classes are:

616 Short with white flower

1850 Tall with white flower

1850 Short with purple flower

8 0

3 years ago

Based on the results of the experiment as well as what you learned about the mechanism of gene transfer between bacterial cells,

cestrela7 [59]

Since, the experiment is not given but on the basis of the mechanism of genetic transfer this question can be answered.

Answer:

The mechanism of gene transfer is important and beneficial for bacteria in the adverse environment conditions. The different mechanism of gene transfer are conjugation, transformation and transduction.

The ampicillin resistance gene is present on the plasmid DNA and not on the chromosomal DNA. Only conjugation is the mechanism in which the plasmid DNA is transferred from one bacteria to another bacteria. The ampicillin resistance gene is transferred from Strain II to strain I means from the bacteria that has the ampicillin resistance gene to the bacteria that has no ampicillin resistance gene in it.

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3 years ago

Autotroph is to producer as heterotroph is

creativ13 [48]

B, consumer. Heterotrophs must eat other things for energy

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3 years ago

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Nuclear energy is a useful source of power but has disadvantages. What is a

mylen [45]

<h2>Nuclear energy:</h2>

The energy which is harvested due to the nuclear fusion or fission occurring in a reactor is called nuclear energy. Though this energy has much application it has certain disadvantages.

<h2>Disadvantages of nuclear energy:</h2>

The radioactive waste originating from atomic power plants and the reactors used act an extraordinary danger to Mother Nature and people.
Improper disposal of radioactive waste released from the reactors, act as base of many deathly diseases.
Another major disadvantage of utilizing nuclear energy is that it needs a ton of venture to set up an atomic power station. Developing an atomic power plant requires enormous capital cost.
When the waste of this energy production process is lead to river body it causes eutrophication which causes the death of the aquatic life.

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3 years ago

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