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aev [14]
3 years ago
6

Which is an example of negative phototropism?​

Biology
1 answer:
MArishka [77]3 years ago
4 0

Answer:

Phototropism is defined as the movements of plants in response to sunlight. In this case sunlight is the stimuli.

Tropism is defined as the movement of a plant or a part of a plant in response to a certain stimuli.

Negative phototropism is the movement of plant or its part away from sunlight. Such as the growth of roots of a plant deeper inside the ground to absorb nutrients from the soil.

Explanation:

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During translation, the new polypeptides are often directed to specific parts of the cell by the presence or absence of short se
Tema [17]

Answer:

The best answers to your question, as per the immense amount of research on the topic, would be: The peptides that you would expect to find in the polypeptide that will eventually fold to become an ion channel protein, would be: 1. A signal-anchor peptide, 2. an internal signal peptide and an amino-terminal signal peptide.

Explanation:

Ion channels are transmembrane proteins whose main purpose is to serve as pathways through which different ions, like potassium, or sodium, can cross from both the inside and outside of the cell as it may be required in different circumstances. These proteins, unlike many others, are first translated from genetic material in the cytosol, and then, thanks to signaling sequences on their chain, they will be taken to the ER and Golgi apparatus, where the rest of the translation and the final packaging will be arranged, so that they may be shipped towards their destination, which is the plasma membrane. These proteins, because of their function, need to have a signal-anchor peptide, an internal signal peptide which will direct them to the ER for final assembly and packaging and an amino-terminal signal peptide.

6 0
3 years ago
Understand the terms genome, chromosome, gene, replication fork, Okazaki fragment, genotype, phenotype, codon, anticodon, promot
HACTEHA [7]

Answer:

Molecular biology aims to study the processes that are carried out in living beings from a molecular point of view

Explanation:

-Genoma: A set of genes contained in chromosomes, can be interpreted as the totality of the genetic material that an organism or a species has

-Chromosome: Each of the highly organized structures, formed by DNA and proteins, and contains most of the genetic information of a living being

-Gen: Molecular unit of genetic inheritance, where genetic information is stored and can be transmitted to the offspring

- Replication fork: Joint between two strands of DNA when it is self-replicating. Each of the DNA strands serve as a template for the synthesis of the new DNA

-Okazaki fragment: Short strands of DNA newly synthesized in the discontinuous strand. They are synthesized in the 5 '→ 3' direction from RNA primers that are later eliminated

-Genotype: Genetic information that an organism has, in the form of DNA

-Fenotype: Expression of the genotype according to a specific environment. They include both physical and behavioral traits

-Codon: Three nucleotide sequence of DNA or RNA corresponding to a specific parameter

-Anticodon: Three nucleotide sequence complementary to a sequence of three other nucleotides found in messenger RNA

-Promotor: DNA section that controls the initiation of RNA transcription

-Intrón: Region of the DNA that is part of the primary transcription of RNA and are removed from the mature transcript, before its translation

-Exon: Portion of gene encoding amino acids

-The modified plasmid size from 1 to more than 1000 kilograms of bases

-The size of the bacterial genome ranges from 0.58 megabases to 10 Mb in several species of cyanobacteria, with the exception of Bacillus megaterium, which has a 30 Mb genome

-The size of the eukaryotic genome is very variable, for example, the smallest sequenced is that of Guillardia theta, of only 0.55 Mb, yeast (1.2 Mb) to amoeba (686,000 Mb).

-In the DNA, the purines are adenine (A) and guanine (G). The pyrimidines are thymine (T) and cytosine (C). In the case of RNA, the purines are A and G and the pyrimidines are C and U (uracil)

-Transcription involves the copy of DNA in RNA. This is the process of gene expression, in which genes are converted into proteins. DNA replication is the process of copying DNA into a cell so that there are two equal copies. As a result, two double chain propellers are obtained, two exact copies. Translation is the process of translating the sequence of a messenger RNA molecule into an amino acid sequence during protein synthesis.

-Helicase breaks the hydrogen bonds that bind the nitrogen bases, causing other enzymes to copy the DNA sequence. The primase synthesizes small fragments of RNA on the lagging chain in DNA replication, of about 10 nucleotides, called primers. DNA polymerase III performs the replicative process, its function is the synthesis of DNA. It has review activity, 3’-5 ’exonuclease. DNA polymerase I has three activities. It has polymerase activity, synthesis in the 5’-3 ’direction. A 3’5 ’exonuclease activity, erroneous nucleotide removal, and a 5’-3’ exonuclease activity, which from a nick resynthesizes a portion of DNA by removing the existing one. This enzyme does not carry out the replication process. RNA polymerase is capable of using ribonucleotides to synthesize RNA from a DNA sequence that serves as a template. Ligase catalyzes the binding of two molecules from the formation of covalent bonds accompanied by the hydrolysis of ATP

4 0
3 years ago
Direct observation is the simplest and most effective method to determine population size
Gre4nikov [31]

Answer:

El statement that say Direct observation is the simplest and most effective method to determine population size is false.

Explanation:

Simple observation results in an inadequate method for estimating the size of a population, especially if it is very large and mobile. A simple and adequate method consists of counting individuals within a population, with some limitations.

Currently, in large populations, it is common to divide an area occupied by a population into quadrants, count individuals, and then extrapolate the data to the actual dimensions of the space occupied by that population.

8 0
3 years ago
Read 2 more answers
In DNA replication, which of the following events happens during both leading and lagging strand synthesis?
Scilla [17]

On the leading strand, DNA synthesis occurs continuously. On the lagging strand, DNA synthesis restarts many times as the helix unwinds, resulting in many short fragments called “Okazaki fragments.” DNA ligase joins the Okazaki fragments together into a single DNA molecule

3 0
3 years ago
How are the DNA strands organized?
nexus9112 [7]

Answer:

double-stranded DNA are tightly looped, coiled, and folded so that they fit easily within the cell. ... In both eukaryotes and prokaryotes, this highly compacted DNA is then arranged into structures called chromosomes.

Explanation:

5 0
3 years ago
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