Question

1. Which of the following is true about the cells in a multicellular organism? (1 point)
-The cells contain different genes and therefore express different genes.
-The cells contain different genes, so they express only the genes they have in common.
-The cells contain the same genes but do not express the same genes.
-The cells contain the same genes and express the same genes.

2. If a scientist changes the path of differentiation in some cells by adding a growth factor, what process is involved? (1 point)
-fertilization
-induction
-cytoplasmic localization
-apoptosis

3. Which of the following shows the correct order of extent of differentiation? (1 point)
-multipotent, totipotent, pluripotent
-totipotent, multipotent, pluripotent
-pluripotent, totipotent, multipotent
-totipotent, pluripotent, multipotent

4. Which of the following is the function of adult stem cells? (1 point)
-provide a safeguard in case a limb transplant is needed
-provide a reservoir of cells for making gametes
-provide a source of cells for the body to replace certain types of cells that die
-provide a backup set of cells that can be used to grow replacement cells in culture

Answer 1

1. The true statement about the cells in a multicellular organism is that the cells contain the same genes but do not express the same genes. The answer to your question is C.

2. The process involved is called cytoplasmic localization. The answer to your question is C.

3. The correct order of extent of differentiation is totipotent, pluripotent, multipotent. The answer to your question is D.

4. The function of adult stem cells is to provide a source of cells for the body to replace certain types of cells that die. The answer to your question is C.

I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

Answer 2

Question 1:

The right answer is C.

Each of our cells contains all of our genetic heritage: 46 chromosomes inherited from our parents on which there are approximately 25,000 genes. But if all our cells contain the same information, they obviously do not all have the same use: a skin cell is nothing like a neuron, a liver cell does not have the same functions as a cell of the heart. Likewise, two twins sharing the same genome are never exactly the same! In these and many other examples, the key to the mystery is called "epigenetic".

Question 2:

The right answer is B.

Cellular induction is The process by which one group of cells engages another group of adjacent cells in a new differentiation pathway. This system intervenes during all the stages of the life of an organism: embryonic, post-embryonic development and during the effective life.

Question 3:

The right answer is D.

Totipotent stem cells can differentiate into all types of cells, embryonic and extraembryonic, and can in themselves produce an entire living organism when re-implanted in a surrogate mother. The cells of the 8-cell stage zygote embryo are totipotent.

Pluripotent cells are the daughter cells of totipotent cells; the stem cells of the internal mass of the embryo at the blastocyst stage 40 are pluripotent

Multipotent stem cells can give different types of cells but only those from a cell line, ectoderm, mesoderm, or endoderm; they are called determined. They are present in the embryo and in the adult.

Question 4:

The right answer is C:

Adult or somatic stem cells are present in children and adults and have been identified in most organs tested: skin, intestine, bone, bone marrow, liver, heart, brain, the pancreas,….

Adult stem cells provide a constant renewal of cells for homeostasis and tissue repair while at the same time maintaining a reservoir of stem cells.