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2 years ago

Each cell that enters the cell cycle contains sister chromatids a. True b. False

Biology

1 answer:

Snowcat [4.5K]2 years ago

3 0

Answer:

b. false

Explanation:

The cell cycle consists of three states: Interphase, Cell division (mitosis) and Resting.

Interphase is composed of phases G1, S and G2. during this state the cell replicates the genetic material of its chromosomes to prepare itself for cell division

In G1 the cell synthesizes mRNA and proteins that the cell will need during mitosis.

In S the cell replicates the genetic material of its chromosomes to prepare itself for cell division. At the end of this phase each chromosome is composed of two sister chromatides.

In G2 the cell grows and and more proteins synthesized for mitosis.

Mitosis is the production of two daughter cells from a sinlge one. During the entire mitosis the chromosomes are duplicated in the cell until finally, the genetic material is distributed in two cells after cytokinesis.

According to the above, it can be seen that the chromosomes in a cell that is in the cell cycle do not necessarily have sister chromatids. For example, chromosomes during G1 do not have sister chromatids.

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Use the terms below to complete the sequence of the levels of organization in a multicellular organism.

Valentin [98]

Cells -> Tissues -> Organs -> Organs systems -> Organisms

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2 years ago

How do nucleotides and hydrogen bonds affect the structure of DNA?

melisa1 [442]

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3 years ago

Providing immunity by injecting the body with a weakened form a pathogen is known as

blagie [28]

Answer:

vaccination

Explanation:

The vaccination has been one of the most revolutionary inventions in the medical field. This invention helped protect people from numerous diseases, some being totally neutralized, while some having only minor effects on the human body. The vaccination basically is a way of enhancing the immune system of the body by injecting in it a weakened form of the pathogen. In this way, the weakened form of the pathogen is not capable to harm the body, and the body is not fighting against it, but instead the pathogen becomes part of the body and its defense mechanism, so when the pathogen strikes, the body has a counter attack and defeats it.

3 0

2 years ago

Tell whether the statement is TRUE or FALSE. Adult brains have about five times the number of connections that a three-year-old

Advocard [28]

It would be completely false to state that adult brains have about five times the number of connections that a three-year-old has. The correct option among the two options that are given in the question is the second option. A child brain has twice as many connections than that of an adult brain.

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2 years ago

The ____________ is sometimes called the "funny bone" because of the tingling sensation (pain) one feels if the ____________ is

Alex

Answer:

Ulnar nerve is also called funny bone and feels tingling sensation if humerus is bumbed. Medial epicondyle passes underneath this bony structure.

Explanation:

The funny bone isn't actually a bone, its actually a nerve that touches your humerus.It is the ulnar nerve, which travels down the arm posteriorly and eventually reaches the "cubital tunnel" and at this location (between the trochlea and medial epicondyle of humerus), ulnar nerve is called funny bone.

The nerve is relatively unprotected at this place.

A blow here may produce a tingling or a numbing sensation throughout the forearm and hand.

Hence, Ulnar nerve is also called funny bone and feels tingling sensation if humerus is bumbed. Medial epicondyle passes underneath this bony structure.

4 0

3 years ago