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3 years ago

Which is an example of a substitution mutation?

Biology

2 answers:

Marta_Voda [28]3 years ago

7 0

Answer:

CAT - GGC - TAC mutates to CAT - GGC - TAG

Explanation:

Changes occur in the nucleotide sequence of the DNA molecule. These changes referred to as MUTATION are usually due mistakes during DNA replication or induced by mutagens (mutation-causing substances). Mutation can be of different types depending on the kind of change that occured to the nucleotide sequence. Based on this question, one of the mutation types is SUBSTITUTION MUTATION.

Substitution mutation is a kind of mutation in which one or more nucleotide base replaces another in the sequence.

The option that suits an example of substitution mutation is: CAT - GGC - TAC mutates to CAT - GGC - TAG because Guanine nucleotide replaces Cytosine nucleotide in the third CODON i.e. TAC becomes TAG.

morpeh [17]3 years ago

4 0

Answer:

CAT - GGC - TAC mutates to CAT - GGC - TAG

Explanation:

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The average distance between the center of the Earth and the center of its moon is 3.84 x 108 m. The mass of the earth is

bagirrra123 [75]

Answer:

T = 2.37 x 106 s = 27.4 days would be the answer

Explanation:

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3 years ago

Describe the key features of the Watson-Crick model for DNA structure.

vagabundo [1.1K]

Answer:

Watson and Crick proposed the double helical model of DNA.

Explanation:

- This model says that DNA exist as double helix. It has two polynucelotide strands running in opposite direction i.e the strands are anti-parallel.

- Each polynucleotide strand is made up of several nucleotide liknked together by phophodiester bonds.

- The two strands are not coiled upon each other but the double strand is coiled upon itself around a common axis like the spiral stair case. Here base pairs forms the stairs and backbone of two strands form railing. Back bone contains sugar and phosphate.

- The base pairing is specific, adenine always pairs with thymine and guanine always pairs with cytosine. Thus if we see any base pair, it consists of one purine and one pyrimidine.

- The two strands of DNA thus show complementary base pairing.

- The strands are held together because of hydrogen bonding between the bases in opposite strand.

- One full helical turn involves ten base pairs and the base pairs are stacked 3.4 A apart.

- This form is called as B-form of DNA.

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3 years ago

The original source of ALL energy for living organisms is ___________, while the most direct, useable source of energy to be use

denpristay [2]

The correct answer is option C

The original source of energy is the sun while most of the energy in the organisms is used in the form of energy. The energy from the sun is used by the green plants to make food by the process of photosynthesis and this food is used by the human beings and animals. The energy in animals and human is in the form of ATP.

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3 years ago

Read 2 more answers

Action and reaction forces are described by which of Newton’s laws of motion?

IrinaK [193]

Answer:

Explanation:

La tercera ley de Newton o principio de acción y reacción establece que cuando dos cuerpos interacción aparecen fuerzas iguales y de sentidos opuestos en cada uno de ellos.

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3 years ago

umka21 [38]

Answer:

Biodiversity

Explanation:

Biodiversity or also called biological diversity is the variation among life on Earth. It encompasses all life form on Earth including plants, animal, microbes etc.

According to the question, bodiversity is the ultimate source of renewable energy on Earth. It is renewable because life has the ability to reproduce, and the greater the reproduction, the higher the probability tibd

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2 years ago