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Elanso [62]
3 years ago
11

A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of t

he normal phenylalanine. The consequence of this for the cell will be that:_____________a) none of the proteins in the cell will contain phenylalanine.b) proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.c) the cell will compensate for the defect by attaching phenylalanine to tRNAs with lysine-specifying anticodons.d) the ribosome will skip a codon every time a UUU is encountered.e) none of the options will occur; the cell will recognize the error and destroy the tRNA.
Biology
1 answer:
solmaris [256]3 years ago
8 0

Answer:

Proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.

Explanation:

Mutation may be defined as the sudden or heritable change in the genetic sequence of the organisms. The mutation can change the phenotype and genotype of the organisms.

The AAA codes for the lysine. The mutation attaches the anticodon AAA instead of normal phenylalanine. The aminonacids AAA will code for the lysine and no phenylalanine is observed in the cell as phenylalanine is coded by UUU and not by AAA.

Thus, the correct answer is option (b).

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Plz <br> I need answers to this help due tmrw
MrRissso [65]

vocabulary 1

1. DNA sequences

2. Homologous structures.

3. Paleontologist

4. analogous structures

5. fossils

6. vestigial

7. Comparative embryology

8. Comparative anatomy

vocabulary 2

1. DNA sequences

2. Analogous structures

3. Comparative anatomy

4. Fossils

5. vestigial

6. homologous structures

7. Comparative embryology

8. structure

9. Scientists

Explanation:

1. Human and apes are evolutionarily closely related based on the analysis of their DNA sequences.

2. Wings of bats and birds serve the same function and are analogous structure.

3. Comparative anatomy is the study of the similarities and differences in structures in similar species.

4. Fossils demonstrate that during the evolution of the whale, the whale moved from land to the sea.

5. The human tailbone and appendix are vestigial organs.

6. The homologous structures are structures that are similar in related organisms because they were inherited from the common ancestor.

7. Comparative embryology is the study of similarities and differences in the embryo of different species.

8. The forelimb of all the mammals has basic bone structure.

9. Scientists who find and study fossils are called paleontologists.

8 0
3 years ago
Voodoo lily is sensitive to the following poison..
Delicious77 [7]

Answer: D) antimycin

Explanation:

Voodoo lily is a water plant. The antimycin is a poison which can inhibit the electron transport chain during the process of photosynthesis or in cellular respiration. This acts by binding to the proteins that participate in the chain of electron transport.

4 0
3 years ago
Drag the pink labels onto the pink targets to identify the two main phases of the cell cycle. Then drag the blue labels onto the
zavuch27 [327]

Answer:

There is no diagram provided so I will just explain the mitotic cell cycle.

Here’s a quick basic arrangement in chronological order interphase, mitosis, and finally cytokinesis.

So first you start with interphase which consist of three phases G1 phase, S phase, G2 phase. Cellular growth occurs in G1 phase of interphase this is followed by S phase which is simply when DNA replication occurs. Final this is followed by G2 phase or further growth in preparation for mitosis and/or meiosis.  

I am only going to explain mitosis but just so I don’t confuse you meiosis can also follow interphase. So mitosis consist of four phases. Prophase, metaphase, anaphase, and telophase.

Prophase: in this phase the nuclear membrane would dissipate and the chromosomes would condense.

Metaphase: then in metaphase the chromosomes would align in the center of the cell and spindle fibers or microtubules would began growth from the centrioles.  

Anaphase: by the start of this phase spindle fibers would have attached themselves to the chromosomes kinetochores. In this phase the chromatids would separate and that’s really it as you can tell this is the shortest phase in mitosis.

Telophase: finally the chromosomes would be brought to the polar opposite ends of the cell and the nuclear membrane would reform. Also the chromosomes condensed chromosomes would unravel eventually they would be invisible.

Finally the cell would enter cytokinesis were it would split at the cleavage furrow which would have started in anaphase of telophase, all a cleavage furrow is, is microfilaments “pinching the cell” which is just them pulling on either side of the center of the cell.

3 0
3 years ago
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dem82 [27]

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6 0
3 years ago
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Petrified Trees are an example of what kind of fossil?
nikdorinn [45]

Answer:

C- Per-mineralized

Explanation:

Hope this helped good luck studying, have a good day/night! <3

6 0
2 years ago
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