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Irina18 [472]
3 years ago
5

How long can peripheral stem cells be stored?

Biology
1 answer:
Taya2010 [7]3 years ago
3 0
////// it is 3 years ///////
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An <br> e. coli cell without a functional laci gene is expected to _____.
Ksenya-84 [330]
An e.coli cell without a functional laci gene is expected to always produce B-galactosidase. i found the answer to this question on a set of quizlet flash cards. i have provided the link below in case you would want to look at the flash cards for reference.

https://quizlet.com/62335789/genetics-important-concepts-flash-cards/
5 0
3 years ago
Explain mutations and how they can cause genetic disease
nadya68 [22]
Answer:

A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals
called mutagens, or infection by viruses. Germ line mutations occur in the eggs and sperm and can be passed on to offspring, while somatic mutations occur in body cells and are not passed on.

Mutation has been the source of many Hollywood movies, but it's really a simple process of a mistake made in a DNA sequence as it's being copied. Some of that's just the background noise that DNA copying is not perfect, and we should be glad of that or evolution couldn't operate. But mutation can also be induced by things like radiation or carcinogens in a way that can increase the risk of cancers or birth defects. But it's pretty simple; it's basically an induced misspelling of the DNA sequence.
That's a mutation.


When a variant alters a protein that plays a critical role in the body, it can disrupt normal development or cause a health condition. A condition caused by variants in one or more genes is called a genetic disorder. In some cases, gene variants are so severe that they prevent an embryo from surviving until birth.

5 0
3 years ago
What are zinc fingers, and why are they frequently encountered in descriptions of genetic regulation in eukaryotes?
Nataliya [291]

Answer:

A zinc finger is also known as zinc-binding repeats or ZnF that are molecular scaffold which is characterized by the coordination of Zn²⁺ ions so it can stabilize the fold.

The zinc fingers consist of several amino acid sequence 2 histidine and 2 cysteine residues at intervals. These residues bind to the zinc atom covalently and form finger-like motifs.

They are a major family of eukaryotic transcription factors. These are identified in a significant regulatory state such as developmental control genes and proto-oncogene by binding to the DNA, RNA, or protein.

4 0
3 years ago
A particularly long radio wave has a wavelength of 1.5 x 10^9 meters. What is the frequency of this radio wave?
Phoenix [80]

Answer:

0.2Hz

Explanation:

The wavelength of a radiowave can be calculated this;

λ = v/f

Where;

λ = Wavelength (m)

v = speed (m/s)

f = frequency (Hz)

Based on the information provided in this question, λ = 1.5 x 10^9 meters, c = 3 × 10^8m/s, f = ?

Hence, using λ = v/f

f = v/λ

f = 3 × 10^8 ÷ 1.5 x 10^9

f = 2 × 10^(8-9)

f = 2 × 10^-1

f = 0.2Hz

7 0
3 years ago
Which organism evolved before the others in geologic time? mammals amphibians reptiles fish?
Murljashka [212]
Pretty sure it's fish
7 0
3 years ago
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