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mamaluj [8]
4 years ago
13

A typical human cell expresses only about 5% of its genes at any time. The expression of a gene can be regulated during any step

in the transition from a gene to a protein. In each step, there is a control point where the gene can be turned on or turned off. The gene expression can direct embryonic development during cellular differentiation in an embryo. The proteins responsible for the regulation are called
Biology
1 answer:
ANTONII [103]4 years ago
3 0

Answer:

Enzymes

Explanation:

The regulation of gene expression is the central dogma of life. It is a series or set of mechanisms in which genetic information in the DNA expresses in the form of RNA or protein. Cells give gene expression b different mechanisms as transcription, maturation of mRNA, and translation.

During these mechanisms, different gene-regulatory proteins are influenced. For example, a set of RNA polymerases that are proteins transcribe the DNA molecule during transcription. Transcription factors are also proteins that control the synthesis of proteins in the cell. These proteins are an enzyme that catalyse the gene regulation in the human cells.

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What are the differences between mitosis and meiosis in human cells? Pay particular attention to the types of cells, number of d
Nezavi [6.7K]
Mitosis Involves one cell division? Results in two daughter cells Results in diploid? daughter cells? (chromosome? number remains the same as parent cell) Daughter cells are genetically identical Occurs in all organisms except viruses Creates all body cells (somatic?) apart from the germ cells? (eggs and sperm) Prophase is much shorter No recombination/crossing over occurs in prophase. In metaphase individual chromosomes (pairs of chromatids) line up along the equator. During anaphase the sister chromatids are separated to opposite poles. Meiosis Involves two successive cell divisions Results in four daughter cells Results in haploid? daughter cells (chromosome number is halved from the parent cell) Daughter cells are genetically different Occurs only in animals, plants and fungi Creates germ cells (eggs and sperm) only Prophase I takes much longer Involves recombination/crossing over of chromosomes in prophase I In metaphase I pairs of chromosomes line up along the equator. During anaphase I the sister chromatids move together to the same pole. During anaphase II the sister chromatids are separated to opposite poles. Similarities Mitosis Diploid parent cell Consists of interphase, prophase, metaphase, anaphase and telophase In metaphase individual chromosomes (pairs of chromatids) line up along the equator. During anaphase the sister chromatids are separated to opposite poles. Ends with cytokinesis. Meiosis Diploid parent cell Consists of interphase, prophase, metaphase, anaphase and telophase (but twice!) In metaphase II individual chromosomes (pairs of chromatids) line up along the equator. During anaphase II the sister chromatids are separated to opposite poles. Ends with cytokinesis.
8 0
3 years ago
In which kingdoms are all organisms multicellular?
Pepsi [2]
Multicellular organisms are referred to as eukaryotes while the opposite, unicellular organisms, are called prokaryotes. Among all the kingdoms, I believe the kingdom which all organisms are multicellular are Animalia and Plantae.
5 0
3 years ago
The theory of plate tectonics:
sertanlavr [38]

A) .was immediately accepted

Explanation:

The theory of plate tectonics was immediately recognized as the explanation for the moving continents. It provided a more scientific background as why continents drift apart and the seafloor keeps spreading.

  • The theory explains that the earth is broken up into series of slabs called lithosphere which moves on the weak, ductile and fluid asthenosphere.
  • The movement of part of the earth mantle provided the mechanism through which the lithosphere moves. This is now known as the mantle convection.
  • This theory provided a scientific mechanism through which the plate moves and seafloor spreads.
  • It was immediately accepted when the theory was propounded by Alfred Holmes in the 1930s

Learn more;

Continental drift brainly.com/question/5002949

#learnwithBrainly

6 0
3 years ago
The pea aphid, a type of insect, contains light-capturing pigments in its exoskeleton. Scientists hypothesize the pea aphids gai
grigory [225]

The pea aphid isn't a true autotroph because it is unable to use the energy from sunlight.

<h3>What is a true autotroph?</h3>

A true autotroph is an organism that produces biomass by a chemical process called photosynthesis.

This type of autotroph generates biomass by means of photosynthetic cycles of production.

In conclusion, the pea aphid isn't a true autotroph because it is unable to use the energy from sunlight.

Learn more about true autotrophs here:

brainly.com/question/13185466

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4 0
2 years ago
The immune response is a dynamic process that initiates with an antigen-independent response, which becomes more focused and pow
prisoha [69]
<h2>False </h2>

Explanation:

The immune system develops integrated innate and adaptive modules that are pathogen type-specific and no single response can effectively control all types of pathogens

Both innate and adaptive immune system operate in cooperative and interdependent ways

Innate immune system is present since birth in an organism and is non specific in nature which means acts against all foreign antigens and molecules and provides first line of defense against pathogens

Adaptive immunity system is the acquired one which is capable of recognizing and selectively eliminating specific foreign antigens and is antigen specific which means can discriminate among different antigens; also has the ability to respond to various kinds of epitopes of pathogens

6 0
3 years ago
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