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RUDIKE [14]
3 years ago
9

During which phase of the cell cycle do the replicated chromosomes thicken and become visible

Biology
2 answers:
Elena-2011 [213]3 years ago
6 0
Metaphase is the phase because this is when everything lines up in the middle and the chromosomes are beginning to separate 
klemol [59]3 years ago
4 0
Prophase, the first stage, is when the chromosomes become condensed and visible under a microscope.
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Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules
timurjin [86]

Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.

b. contain multiple variable domains ⇒ none

Both chains - light and heavy - contain <u>only one</u> variable domain (VL and VH).  

c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.  

d. are found in the FC fragment ⇒ heavy chains

The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.  

e. contain only one constant domain ⇒ light chains

Each light chain contains one variable domain (VL) and one constant domain (CL).  

f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.  

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

8 0
3 years ago
Seismologists inge lehamann studied earthquakes. Which layer of earth did she predict to be solid after observing the motion of
arsen [322]

Inner core  was found to be solid after observing the motion of P waves.

Explanation:

Seismologist Inge Lehmann, studied the seismic waves of an earthquake and discovered about inner core in the mantle layer of Earth. She States that there is a boundary of discontinuity between the outer and inner core of Earth.

She studied the travel of secondary and primary waves during an earthquake and how it flows at different shells of Earth's layer which helped her in finding about the inner core of mantle. She observed that the inner core is a solid layer inside the molten layer of outer core

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3 years ago
What are two constants in this experiment ​
KiRa [710]

Answer:

I do not see any experiment, your gonna have to post a picture of it or type out what it is.

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The jellylike substance that holds everything in place inside all cells is called the....
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Answer:

Cytoplasm is the semi fluid gel like substance of a cell that is present within the cellular membranes and surrounds the nucleus.

Explanation:

Hope this helps! ^^

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3 years ago
What is the function of the human immune system
pshichka [43]
The immune system<span> is made up of a network of cells, tissues, and organs that work together to protect the body. One of the important cells involved are white blood cells, also called leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.</span>
6 0
3 years ago
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