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3 years ago

Given the gene sequence GGACCGTCGATCTTC, which of the following choices would represent an inversion mutation?

Biology

1 answer:

Lena [83]3 years ago

6 0

Answer:

D. GGACCGTCGATCCTT

Explanation:

Mutation refers to any change in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. According to the question, an INVERSION mutation is a type of mutation in which a segment of a gene gets broken off and reattached in another way on the same DNA. Hence, the only change in inversion mutation is the arrangement of the nucleotide bases on the gene.

Considering the nucleotide sequence: GGACCGTCGATCTTC, the sequence that describes an occurrence of inversion mutation is: GGACCGTCGATCCTT because the segment TTC in the original sequence has been rearranged as CTT in the mutated sequence.

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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

Which of the following is NOT true about wearing jewelry when preparing or handling food a.watches and bracelets can

Gala2k [10]

When you are preparing or handling food, there are certain precautions to be followed to keep the eatables hygienic.

While handling food, one should remove before prepping food. He/she cannot wear rings, except the plain band. Bracelets and watches don’t matter as they are physically contaminated.
Eating, Drinking, Smoking, and Chewing Gum or Tobacco is strongly prohibited in the cooking area. Small droplets of saliva can contain thousands of pathogens, therefore, avoid spitting while prepping or serving food. Items of jewelry like rings, bracelets, and watches could collect soil and it could obstruct routine cleanup. As a result, the jewelry could act as a reservoir of unhealthful organisms which may transfer to the food.

7 0

4 years ago

Which of the following are true concerning the differences between carbohydrates and lipids.

irina1246 [14]

M I think the answer is a run on sentence

4 0

2 years ago

Name two types of evidence used to support the theory of evolution. Explain how scientists use each type of evidence to provide

TEA [102]

Evidence for evolution, in other words evidence of common descent, include fossils, which have shown a (fairly) steady change in morphology over time for some species. An example would be horse hooves: we have fossils that show when they were still three toed, then two toed, then one toe in our present day horses. Another piece of evidence is vestigial organs. An example of vestigial organs is wings in some flightless birds, such as the kiwi. Their ancestors used it in order to fly across the marine barrier into New Zealand, but natural selection and random genetic drift made them quickly lose the ability to fly. Nonetheless, they still have their wings, however small. It can be assumed that eventually, their wings would be reduced to small stubs fused to other nearby bones, as has been observed in their cousins.

8 0

3 years ago

A scientist wanted to see if the number of eggs in a nest varied according to latitude. She decided to study a specific species

77julia77 [94]

Answer:

A. Does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The latitude of the area

C. The number of eggs

D. The species of the bird

E. The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. 600 nests

G. The number of eggs

Explanation:

A. In the investigation, the scientist wanted to see if the number of eggs in a nest varied according to latitude, therefore, the question she will be seeking an answer to is: does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The independent variable is the variable that is not affected by the other variables being measured in an investigation. In the investigation by the scientist, the latitude of an area is the independent variable in that it is independent of changes in the other variable- the number o eggs- in the investigation.

c. The dependent variable is the variable that is affected by changes to the other variable in an investigation. The number of eggs is expected to vary according to latitude, is therefore, it is the dependent variable.

D. The constant is the factor that does not change during the experiment. The bird species is the constant as it does not change in the investigation.

E. A hypothesis is a specific statement predicting the result of an investigation or study.

In this study, the hypothesis could be: The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. The sample size gives the the total number of subjects, individuals or observations in a study. In this case, the subjects are bird nests, and the sample size is 600 nests.

G. The number of eggs in all the nests were counted; therefore, it is the repeated measure.

7 0

3 years ago