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dlinn [17]
3 years ago
7

Which of the following is a condition caused by an infestation of head lice?

Biology
2 answers:
Norma-Jean [14]3 years ago
5 0

Answer:

b. scabies

Explanation:

scabies is caused by an infection from Mites and Mites and Lice are the same thing

kirza4 [7]3 years ago
4 0

Answer: C. Pediculosis capitis

Explanation:

Head lice is caused by pediculosis capitis. It is very infection and common among children. The female head lice called louse lays and attach its egg on the scalp which hatch after 7-10days leading to a heavy breakout of lice in the hair. Lice are able to attach themselves to smooth hair, It is characterize by scratching heavily.

Sharing of combs should be avoided to prevent lice and it can be cured by the use of antibiotics.

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The answer is D, all the other choices are example of phenotypes
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3 years ago
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Which of the following correctly describes the process of Translation?
Lyrx [107]

Answer:

I. tRNA anticodon bonds to mRNA codon

II. Ribosome bonds to mRNA strand

III. Ribosome reaches a STOP codon and detaches from the mRNA

IV. Each tRNA adds an Amino Acid to the chain as the Ribosome moves along the mRNA

Explanation:

Translation is the second process of gene expression in which a protein molecule is synthesized from the information in a mRNA strand. Translation occurs in the RIBOSOME (an organnelle for protein synthesis made up of ribosomal RNA (rRNA) and proteins). The process of translation occurs in three stages viz: Initiation, Elongation and Termination.

Initiation occurs when the ribosome binds to the mRNA strand in the cytoplasm. The mRNA sequence is then read in a group of three nucleotides called CODON by the ANTICODON of a transfer RNA (tRNA). The basis of reading is the complementary base pairing rule i.e. A-U, G-C. Options I and II describes this stage.

In the elongation stage, the tRNA carries an amino acid corresponding to what it reads in the mRNA codon to the growing polypeptide chain. The amino acids bonds to one another via a peptide bond. As each codon is being read, the mRNA gradually moves over the means sequence. Option IV describes this stage.

Elongation stage continues until any of the stop codons (UAA, UAG, and UGA) are finally encountered by the trans in the ribosome. Since, there are no corresponding anticodons that can read the stop codons, they signal the termination of the translation process. The ribosome then detaches from the mRNA sequence. Option III describes this stage.

Note, option V describes TRANSCRIPTION not TRANSLATION.

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Question 1
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Explanation:

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