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kherson [118]
2 years ago
15

Which of the following contains the correct parts of a nucleotide found in DNA?

Biology
1 answer:
oksian1 [2.3K]2 years ago
8 0
B hdudisnsnisnxndjdi
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Is the binding of a transcription factor to its dna recognition sequence necessary and sufficient for an initiation of transcrip
hram777 [196]

Transcription factors are necessary for an initiation of transcription at a regulated gene but not sufficient.

Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:

1. Initiation

• RNA polymerase with transcriptional factors bind to gene promoter Transcription factors can enhance the interaction between RNA polymerase and a DNA sequence- promoter, encouraging the expression of the gene. Such transcription factors are called activators. Otherwise, when the gene expression is inhibited, factors are called repressors and they bind to sequence –operator.

• RNA polymerase unwinds DNA double helix (transcription bubble is formed)

2. Elongation

• RNA polymerases adds nucleotides complementary to DNA  

3. Termination

• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)

• Formed complementary RNA strand is released from DNA-RNA complex

6 0
3 years ago
1. If an organisms has a SPERM CELL with 4️⃣chromosomes. It will have____chromosomes in its SKIN CELL. *
Ksenya-84 [330]

Answer:

8 chromosomes in its skincell

Explanation:

Sex organ is (n)

Other than sex organ is 2(n)

4 0
3 years ago
A population of mice has black or brown hair. The gene for black hair color (B) is dominant over brown (b). If 16% of the mice a
astraxan [27]
If B and b are the two alleles , B + b = 1 and B ^2 +2 Bb + b ^2 = 1.

If 16% of mice are homozygous black , B ^ 2 =0 .16, meaning B = 0 .4 and b = 1 - 0. 4 = 0 .6 .
Answer = Notice how you don't even need to know that 24% of the mice are heterozygous .
6 0
3 years ago
4. Hyperthyroidism occurs when the thyroid produces too much
leva [86]

Answer: A

Explanation:

3 0
3 years ago
What do fertilizers contain, that make plants and algae grow faster​
arsen [322]

Answer:

the fertilizers contain nitrogen potassium and phosphorus . this makes the plants and algae grow faster

Explanation:

Fertilizers supply plants with the elements that may be missing or in short supply in a form that can be used by the plants for faster growth. Most fertilizers supply nitrogen, phosphorus and potassium

3 0
3 years ago
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