Asked by: Nasra Sturm
science genetics

What controls the way in which a zygote differentiates?

21
What controls the way in which a zygote differentiates? Selective genes are turned on and off, depending on the fate of the cell. The particular genes that are active in each type of differentiated cell are the source of its particular function and structure.


Also, what is the correct order of structures in a chromosome from smallest to largest?

Place the following terms in the correct order from smallest to largest: Nucleosome, supercoils, coils, chromosome, DNA double helix. Nucleotide, Nucleosome, coils, supercoils, chromosome.

Also Know, which mechanism of controlling gene expression occurs outside of the nucleus? Transcription and translation were physically separated into two different cellular compartments. It therefore became possible to control gene expression by regulating transcription in the nucleus, and also by controlling the RNA levels and protein translation present outside the nucleus.

In this manner, why do cells continue to maintain proto oncogenes?

A proto-oncogene is a normal gene that can change into an oncogene. Oncogenes are potentially lethal genes that can cause cancer. Why do cells continue to maintain these genes? Proto-oncogenes are necessary for normal control of cell division.

What is bigger DNA or gene?

Genes contain DNA (deoxyribonucleic acid). DNA is the chemical basis of heredity. Think of it this way: DNA is in genes, genes are on chromosomes. When "mapping" all genes on all human chromosomes was first seriously conceived, it was called the Human Genome Project - a combination of gene and chromosome.

Related Question Answers

Mathis Frintrop

Professional

What are the three parts of a nucleotide?

A nucleotide consists of three things:
  • A nitrogenous base, which can be either adenine, guanine, cytosine, or thymine (in the case of RNA, thymine is replaced by uracil).
  • A five-carbon sugar, called deoxyribose because it is lacking an oxygen group on one of its carbons.
  • One or more phosphate groups.

Buchra Papp

Professional

Is a cell or chromosome bigger?

The only thing you can say is that organs and tissues are made of many cells, so they tend to be bigger than cells. Nuclei are smaller than most eukaryotic cells, but bigger than some prokaryotic cells. Chromosomes tend to be smaller than cells or nuclei, and genes are parts of chromosomes.

Katty Martin Portugues

Professional

Which is bigger chromosome gene or nucleus?

Gene is the basic functional and physical unit of heredity and is made up of DNA. Chromosomes contain nucleic acids and proteins and they carry the genetic information in the form of genes. The nucleus contains chromosomes. It is a membrane-bound structure and contains the hereditary information.

Vida Tzander

Explainer

What is the order of the following from smallest to largest?

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

Marianna Erbsmehl

Explainer

Which is smaller chromosome or nucleus?

The smallest chromosome, chromosome 21, contains about 300 genes. (Chromosome 22 should be the smallest, but the scientists made a mistake when they first numbered them!). The DNA that contains your genes is stored in your cells in a structure called the nucleus.

Hasier Mobis

Explainer

What is the purpose of a gene?

A gene is a small section of DNA? that contains the instructions for a specific molecule, usually a protein?. The purpose of genes? is to store information. Each gene contains the information required to build specific proteins needed in an organism. The human genome? contains 20,687 protein-coding genes.

Lowell Herberth

Pundit

Is a nucleotide smaller than a gene?

That's two nucleotides attached side by side. In other words a chromosome is a really long section of DNA, which is made of nucleotide units. A gene is a smaller section of a chromosome. A different way to put it is that a gene is a smaller section of DNA, or a group of bases (which are a part of the nucleotide).

Mayara Furet

Pundit

Why do cells make proteins with such a short life?

Short-lived proteins enable the cells to adjust (control) gene expression when this is critical to their well-being.

Wanetta Itxso

Pundit

How do cells differentiate?

Cell differentiation is how generic embryonic cells become specialized cells. This occurs through a process called gene expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.

Clarisse Wegehaupt

Pundit

Why is the lac operon said to be an inducible operon?

Allolactose binds to the lac repressor and makes it change shape so it can no longer bind DNA. The lac operon is considered an inducible operon because it is usually turned off (repressed), but can be turned on in the presence of the inducer allolactose.

Amadou Ebergard

Pundit

When a transcription regulator binds to DNA its most important interactions occur with?

Terms in this set (20) Transcription regulators usually bind where on a DNA double helix? When a transcription regulator binds to DNA, its most important interactions occur with: nucleotide pairs in the major groove of the double helix.

Ismahan Theeuwen

Teacher

What is the main function of a promoter?

Definition. A promoter is a region of DNA where transcription of a gene is initiated. Promoters are a vital component of expression vectors because they control the binding of RNA polymerase to DNA. RNA polymerase transcribes DNA to mRNA which is ultimately translated into a functional protein.

Argia Bernack

Teacher

What is alternative splicing and why is it important?

Alternative splicing of RNA is a crucial process for changing the genomic instructions into functional proteins. It plays a critical role in the regulation of gene expression and protein diversity in a variety of eukaryotes. In humans, approximately 95% of multi-exon genes undergo alternative splicing.

Iordanka Moncho

Teacher

What do transcription factors do?

In molecular biology, a transcription factor (TF) (or sequence-specific DNA-binding factor) is a protein that controls the rate of transcription of genetic information from DNA to messenger RNA, by binding to a specific DNA sequence.

Saidia Pavlic

Teacher

What controls gene expression in eukaryotes?

Gene expression in eukaryotic cells is regulated by repressors as well as by transcriptional activators. Like their prokaryotic counterparts, eukaryotic repressors bind to specific DNA sequences and inhibit transcription. Other repressors compete with activators for binding to specific regulatory sequences.

Cyrus Horning

Reviewer

How gene is regulated?

Gene regulation refers to the mechanisms that act to induce or repress the expression of a gene. These include structural and chemical changes to the genetic material, binding of proteins to specific DNA elements to regulate transcription, or mechanisms that modulate translation of mRNA.

Nia Jariod

Reviewer

How do eukaryotic organisms regulate the process of translation?

Eukaryotic organisms express a subset of the DNA that is encoded in any given cell. In each cell type, the type and amount of protein is regulated by controlling gene expression. To express a protein, the DNA is first transcribed into RNA, which is then translated into proteins.

Akmal Onenko

Reviewer

What are genes controlled by?

Groups of genes coding for related proteins are arranged in units known as operons. An operon consists of an operator, promoter, regulator, and structural genes. The regulator gene codes for a repressor protein that binds to the operator, obstructing the promoter (thus, transcription) of the structural genes.

Nadra Cuervo Arango

Reviewer

What does the term gene expression refer to?

Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. Several steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-translational modification of a protein.

Co-Authored By:

EveryThingWhat Staff Editor

3

29th February, 2020

208

83% of readers found this page helpful.

4.5/5

Click a star to add your vote

Similar Asks
Trending