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rodikova [14]
3 years ago
9

_____ is a T-cell-specific adhesion molecule expressed before the expression of a functional T-cell receptor while the thymocyte

s are still in their double-negative stage of development
Biology
1 answer:
NARA [144]3 years ago
8 0

Answer:

CD2

Explanation:

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What are cells that produce new cartilage matrix called?.
Nastasia [14]

Answer:

The stem cells differentiate into chondroblasts. 3. These chondroblasts, located at the periphery of the old cartilage, begin to produce and secrete new cartilage matrix. As a result, they push apart and become chondrocytes, each occupying its own lacuna.

Explanation:

4 0
2 years ago
You experimentally change the DNA sequence directly upstream of a start codon of an operon in E coli to investigate the function
Phoenix [80]

Answer:

Mutation occurred in ribosome binding site that serves as binding site for 30S ribosomal subunit of <em>E. coli</em> and allows the process of protein synthesis to begin.

Explanation:

The initiation of protein synthesis in bacteria requires binding of the ribosome to the ribosome binding site. The ribosome binding site in bacteria consists of the initiation codon "AUG" and the preceding Shine-Dalgarno sequence. The AUG initiation codon and Shine Delgrano sequence are around 10 bases apart.

The sequence is polypurine hexamer and is represented by 5' ...AGGAGG...3'. Shine-Delgrano sequence is complementary to the conserved sequence present at the 3' end of 16SrRNA of the 30S subunit of the bacterial ribosome. Binding of Shine Delgrano sequence of ribosome binding site and the complementary sequence of the 30S ribosomal subunit marks the first step in the initiation of protein synthesis.

Any mutation in the ribosome binding site would not allow the process of protein synthesis to start or would reduce the rate of the initiation of protein synthesis.

8 0
3 years ago
What is the difference between a true rib.a false rib and a floating rib
ivann1987 [24]

True rib : the first seven ribs attach to the sternum (the breast bone) in the front and are known as true ribs (or sternal ribs)

False ribs: the lower five ribs do not directly connect to the sternum and are known as false ribs  

Floating ribs :The floating ribs are less stable and risk breaking because they have only one attachment  

Dorsally to the vertebrae and have very thin bone tissue locked in muscle as they extend  

Laterally.


8 0
2 years ago
Read 2 more answers
Can somebody help me with this ?
SIZIF [17.4K]
Well for the latitude add 5 but for the longitudei dont know, try adding 2 and find the pattern.
7 0
3 years ago
How do ocean currents affect temperature? Check all that apply
zlopas [31]

Answer:

Ocean currents are the continuous, predictable, directional movement of seawater driven by gravity, wind (Coriolis Effect), and water density. Ocean water moves in two directions: horizontally and vertically. Horizontal movements are referred to as currents, while vertical changes are called upwellings or downwellings.They carry cold water from the poles to the equator and cool air over land.  They move warm water from the equator to the poles and heat air over land.

Explanation:

They carry cold water from the poles to the equator and cool air over land.  They move warm water from the equator to the poles and heat air over land.

8 0
3 years ago
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