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4 years ago

1.

Biology

2 answers:

anyanavicka [17]4 years ago

8 0

1. Embryonic stem cells are pluripotent because they can grow into any type of body cell, but they cannot become totipotent.
Totipotent cells can form all the cell types in a body, plus the extraembryonic, or placental, cells. Embryonic cells within the first couple of cell divisions after fertilization are the only cells that are totipotent. Pluripotent cells can give rise to all of the cell types that make up the body; embryonic stem cells are considered pluripotent.

2. All muscle cells working together to produce working muscle tissue is an example of which theme of biology?
Structure and function

3. Based on the graph what can be concluded about stem cell banking?
The amount of stem cells being banked has increased over the past 25 years

4. Banking stem cells is a very popular practice in science. This is when stem cells, located in the umbilical cord of a birthed infant, are saved and frozen. Why could this be a beneficial practice?
Stem cells are undifferentiated and therefore, could be used to grow into any kind of cell of the body

5. Blood cells are different than nerve cells in how they look and what they do. Why is this, since both of these kinds of cells are found in humans?
The cells have differentiated to perform different tasks within the organism

telo118 [61]4 years ago

7 0

The amswer s are figure it out

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Describe the productions of protein through transcription and translation

Rainbow [258]

Genes provide information for building proteins. They don’t however directly create proteins. The production of proteins is completed through two processes: transcription and translation. Transcription and translation take the information in DNA and use it to produce proteins. Transcription uses a strand of DNA as a template to build a molecule called RNA. The RNA molecule is the link between DNA and the production of proteins. During translation, the RNA molecule created in the transcription process delivers information from the DNA to the protein building machines. Through transcription the sequence of bases of the DNA are transcribed into the reciprocal sequence of bases in a strand of RNA. Through transcription the information of the DNA molecule is passed onto the new strand of RNA which can then carry the information to where proteins are produced. RNA molecules used for this purpose are known as messenger RNA (mRNA). A gene is a particular segment of DNA. The sequence of bases in for a gene determines the sequence of nucleotides along an RNA molecule. Only one strand of a DNA double helix is transcribed for each gene. This strand is known as the ‘template strand’. The same template strand of DNA is used every time that particular gene is transcribed. The opposite strand of the DNA double helix may be transcribed for other genes. During translation, the information of the strand of RNA is ‘translated’ from RNA language into polypeptide language i.e. the sequence of nucleotides is translated into a sequence of amino acids.

A lot of informations but I hope this helps ;)

6 0

3 years ago

What clues could you use to help determine whether movement of oslutes through the apicl and basolateral cell membranes is passi

Setler79 [48]

Answer:

Clues that can be used to determine whether the movement of solutes through the membrane is passive or active could be the molecule size, membrane potential, and the presence/absence of membrane protein.

Explanation:

Solutes transport through the cellular membrane depends on the solute size, membrane potential, and the presence/absence of integral membrane protein.

There are two types of transport: Active and passive.

- Passive transport: It does not need energy; it is driven by a chemical potential gradient. Small molecules with no charge are transported through the membrane in a gradient favor, from a high concentration region to a low concentration region. There are two types of passive transport: By simple diffusion (small molecules pass through the membrane by themselves) and by facilitated diffusion (molecules are helped by integral membrane proteins to pass through the membrane). In facilitated diffusion, the helping protein can be a channel protein (hydrophilic pores that allow the molecule to pass with no interaction) or a carrier protein (proteins with mobile parts that suffer modification as the molecule pass to the other side).

- Active transport: It does need ATP energy to pass the molecule through the membrane, as they have to move against the electrochemical gradient. This kind of transport is always mediated by a carrier protein. These proteins join with the molecules and suffer changes as they pass the solute to the other side of the membrane. An important example of this kind of transport is the sodium-potassium bomb.

6 0

4 years ago

The information carried by a dna molecule is in __________.

Papessa [141]

Answer:

Sequence of nucleotides in the DNA strand

Explanation:

Deoxyribonuceic acid or DNA is a biological material that stores the genetic information of an organism.

DNA encodes the information through the order or sequence of the nuceotides along each strand. Organisms differ from one another because their respective DNA molecule have different nucleotide sequences and consequently, carry different biological instructions.

A DNA strand consists of two polynucleotide chains, composed of four nucleotide subunits. Each of these chains is known as DNA strand. Hydrogen bonds between the base portions of the nucleotides hold the two chains together. DNA nucleotides are composed of a 5-carbon sugar (Deoxyribose) to which are attached one phosphate group and a nitrogenous base (Adenine, Guanine, Cytosine and Thymine). The nucleotides are covalently linked together.

5 0

3 years ago

The following DNA strand is used as a template for transcription:

bonufazy [111]

The answer is B
C pairs with G, T pairs with A but in RNA T is replaced with U so A pairs with U

6 0

3 years ago

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The mitochondrion is host to which portion of cellular respiration?

Tomtit [17]

The correct answer should be (d) The Krebs cycle

After Glycolysis, the Krebs cycle begins in the matrix of the mitochondrion.

3 0

4 years ago

Read 2 more answers