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VikaD [51]
3 years ago
9

Viruses, although not considered to be alive, attack host cells and cause disease. The attack of a host cell is necessary for th

e virus to survive for all of the reasons listed EXCEPT one. That is
A) they cannot synthesize proteins because they lack ribosomes and must use the ribosomes of their host cells to translate viral messenger RNA into new proteins.
B) they cannot produce or store energy in the form of ATP and have to get their energy from the host cell.
C) they parasitize the host cell for basic molecules like amino acids, nucleotides, and lipids.
D) they lack DNA so they must use the DNA of the host cell
Biology
2 answers:
abruzzese [7]3 years ago
7 0
<span>D) they lack DNA so they must use the DNA of the host cell

Viruses do in fact have their own DNA.</span>
lakkis [162]3 years ago
7 0

Answer:

D) they lack DNA so they must use the DNA of the host cell

Explanation:

All but they lack DNA/RNA so they must use the DNA of the host cell. Viruses do contain DNA or RNA, which they inject into the host cells. Viral RNA is used to produce viral proteins from the organelles and molecules in the host cell.

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Why does each parent contribute only one allele to the offspring?
Natasha2012 [34]

Answer:

Because the gametes implemented in fertilisation are haploid in nature, in the case of humans, mature gametes contain 23 chromosomes instead of 46 which will then combine with another parents' 23 chromosomes during fertilisation, i.e: 23 (dad) + 23 (mom) = 46 (zygote)

Explanation:

A regular somatic cell has 46 chromosomes, 2n, 2 alleles but the gametes have 23 chromomes, n, 1 allele. The usual significance of this is so that there is diversity in the offspring and the offspring can gain characteristics (bad or good) from both parents.

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Does anyone feel like there not wanted bt no one becasue if u do i know how u feel:(((((
Lelechka [254]

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You catch ,tag ,and release 35 fish back into a pond . Then, you catch 70 more fish , 12 of which have tags on them . What is th
Anni [7]
The best estimate is 93. 70-12= 58. 58+35 is 93.
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How was HMS Beagle's voyage significant to science?
Kamila [148]
It was the trip that Charles Darwin went on in attempt to find the answer of how animals got on earth in the first place and how they changed over time. This later on helped him discover evolution and natural selection. The most significant find on this voyage was that he found that different types of finches evolved to the food around them. Smaller beaks meant the finch ate more small nutrients but larger beaks meant the finch ate more harder prey such as fish and worms.
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The DNA sequence that produced the mRNA sequence uracil, guanine, cytosine, guanine adenine uracil adenine adenine
vesna_86 [32]

Answer:

The DNA sequence that produced the mRNA sequence uracil, guanine, cytosine, guanine adenine uracil adenine adenine during transcription is adenine, cytosine, guanine, cytosine, thymine, adenine, thymine, thymine.

Explanation:

Transcription of DNA into messenger RNA (mRNA) is a process in which the specific nucleotide sequence is transferred from one molecule to another, through the synthesis of mRNA molecules from a DNA strand.

The complete transcription process is done by nitrogenous base complementarity, where mRNA receives the sequence of complementary bases according to the DNA sequence:

  • <em>Adenine</em><em> is complemented with uracil, since in RNA the thymine is substituted by this uracil. </em>
  • <em>Thymine</em><em> is complemented with adenine. </em>
  • <em>Cytosine</em><em> is complemented with guanine. </em>
  • <em>Guanine</em><em> is complemented with cytosine. </em>

Thus an <u>uracil mRNA sequence, guanine, cytosine, guanine adenine uracil adenine U-G-C-G-A-U-A-A comes from a DNA sequence adenine, cytosine, guanine, cytosine, thymine, adenine, thymine, thymine or A-C-G-C-T-A-T</u>.

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