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3 years ago

The mutation that causes sickle cell disease in humans is

Biology

2 answers:

ExtremeBDS [4]3 years ago

4 0

Substitution Mutations

IgorC [24]3 years ago

3 0

Answer: Missense mutation

Explanation:

Missense mutation is a type of point mutation where a single nucleotide is changed to cause substitution of a different amino acid. This in turns render the resulting protein non-functional.

In the case of sickle-cell disease, the sixth amino acid in the gene sequence, glutamate (GAG) is substituted with valine (GUA), due to Adenine nucleotide changed to Uracil nucleotide. Thus, missense mutation has occurred

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Instructions: 1 Using the DNA sequence, make a complementary RNA strand from both the human and the cow. Write the RNA directly

Ksenya-84 [330]

Answer:

Please find the complete table attached as an image

Explanation:

This task is describing the processes of transcription and translation, which are the two processes involved in gene expression. The DNA of a human and cow is given in the table of the attached image and we're asked to transcribe into a complementary RNA, and subsequently translate into an amino acid using the CODON table (genetic code).

- Transcription is the process whereby DNA is used as a template for the synthesis of RNA based on complementary base pairing i.e. A-U, G-C, T-A etc.

- Translation is the process whereby RNA transcript is used to synthesize an amino acid sequence. The mRNA is read in a group of three nucleotides called CODON, where each of this codon specifies an amino acid.

The table has been completed and attached below. Note that in the amino acids row;

GLY means Glycine

ILE means Isoleucine

VAL means Valine

GLN means Glutamine

CYS means Cysteine

THR means Threonine

SER means Serine

PHE means Phenylalanine

ALA means Alanine

LEU means Leucine

4 0

3 years ago

Will thumbs up all comments

Vinil7 [7]

1.true 2.false 3.the diffusion of water across a membrane 4.Rr

6 0

3 years ago

This type of worm is part of the phylum Nematoda. It has nostrils but no eyes. It moves its body by bending from side to side. W

Dvinal [7]

The correct option is C.
Roundworm belongs to the kingdom animalia and to the phylum nematoda. It has round, unsegmented, smooth and thin body which can grow to the maximum of four feet in length. It has a bilateral symmetry. A roundworm has no skeleton and it reproduces sexually.

3 0

3 years ago

The table below shows the number of chromosome pairs for various

mario62 [17]

Meerkat- the more chromosomes the more different gametes can be created

6 0

3 years ago

Read 2 more answers

Though plants, fungi, and prokaryotes all have cell walls, we place them in different taxa. Which of these observations comes cl

shtirl [24]

Answer:

Their cell walls are composed of very different biochemicals.

Explanation:

Biological classification is important to classify the organisms on the basis of their similarities and differences between them. Linnaeus is known as the father of biological classification.

Cellwall plays an important role in the maintenance of structure and function of the organisms. The composition of the cell wall of fungi, plants and prokaryotes are quite different. Plants cell wall made of cellulose, fungi has chitin in its cell wall and prokaryotes has different layers of cell wall.

Thus, the correct answer is option (D).

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3 years ago