Question 22 (5 points)The major difference between B cells and T cells is that
T cells do not produce antibodies.
B cells do not produce antibodies.
B cells always circulate in the blood stream.
T cells always circulate in the blood stream.

Answers

Answer 1
Answer:

Answer:

B cells always circulate in the blood stream

Explanation:

just took test pf.


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The diagram below represents levels of organization in living things. Which term would best represent X? A. Stomach
B. Human
C. Tissue
D. Chloroplasts

Answers

The term that would best represent X would be tissue.

The simplest level of organization of living things is the cell followed by tissue, organ, organ system, and then the organism itself.

  • The cell represents the simplest unit of existence
  • Cells come together form tissues in order to perform a function
  • Different tissues come together to function as a unit known as organs
  • Different organs make up the system and the body of an organism is made up of different systems.

More on levels of organization of living things can be found here: brainly.com/question/282455?referrer=searchResults

The correct answer is C. Tissue

Explanation:

In the diagram, x is between organ and cell level. This implies this level of organization is smaller than an organ but no as small as one cell. In this context, the most suitable term to add to this level is a tissue because these are structures composed of specialized cells, which shows this level encloses cells. Also, a group of tissues forms an organ; this implies the organ is the level that follows the tissue. Examples of this include muscle tissue composed of muscle cells and that is part of organs including the heart.

In the process of embryonic development, which stage comes first?A. Gastrula
B.Blastocyst
C.morula
D.Blastocoel

Answers

Ans.

Embryogenesis or embryonic development is defined as a process that involves formation and development of a zygote into embryo. The fertilized egg or zygote undergoes mitotic divisions through cleavage and divides rapidly.

The first stage of embryonic development is known as morula that represents a 16 cells consisting solid ball-like structure. The morula later develops into blastula.

Thus, the correct answer is option C). 'morula.'


i think b but i could be wrong

Transcription and Translation Practice Worksheet
Example:
DNA : G T A C G C G T A T A C C G A C A T T C
mRNA: C A U G C G C A U A U G G C U G U A A G
Codons: AUG-CGC-AUA-UGG-CUG-UAA
Anticodons: UAC-GCG-UAU-ACC-GAC-AUU
Amino Acids: Methionone-Arginine-Isoleucine-Tryphtophan-Leucine
Using the example above, transcribe the following DNA strand into mRNA and translate that strand into a polypeptide chain, identifying the codons, anticodons, and amino acid sequence.
1. DNA: A T A C G A A A T C G C G A T C G C G G C G A T T C G G
mRNA:
Codon:
Anticodon:
Amino Acids:
2. DNA: T T T A C G G C C A T C A G G C A A T A C T G G
mRNA:
Codon:
Anitcodon:
Amino Acids:
3. DNA: T A C G G G C C T A T A C G C T A C T A C T CA T G G A T C G G
mRNA:
Codon:
Anitcodon:
Amino Acids:
4. DNA: G T A C G C G T A T A C C G A C A T T C
mRNA:
Codon:
Anitcodon:
Amino Acids:
Transcribe the following DNA strand into mRNA and translate that strand into a polypeptide chain, identifying the codons, anticodons, and amino acid sequence.
DNA: C G A T A C A A T G G A C C C G G T A T G C G A T A T C C

Answers

Transcription occurs in the nucleus and translation occurs in the cytosol. Proteins are AUG-CUU-UAG / MET-PRO-VAL-VAL-ARG-ILE-LEU / MET-PRO GLY-TYR-ALA-MET-MET-SER-THR /  MET-ALA-TYR-THR-LEU

----------------------------------

Transcription

  • Transcription occurs in the nucleus. In RNA uracil replaces thymine.

  • While growing mRNA molecule,

→  adenine pairs uracil,

→  thymine pairs adenine, and

→  guanine pairs cytosine.

Translation

  • Translation occurs in the cytosol. mRNA codons codify for amino acids.

  • There is a start Codon AUG and stop codons UAA, UAG, UGA.

1.

DNA:       A T A C G A A A T C G C G A T C G C G G C G A T T C G G

mRNA:    U A U G C U U U A G C G C U A G C G C C G C U A A G C C  

Codon:     AUG   CUU   UAG    

here we recognize the start codon and a stop codon very close.

Anticodon: UAC   GAA    AUC   GCG   AUC   GCG   GCG   AUU   CGG    

Amino Acids:  MET -  LEU  

2.

DNA:    T T T A C G G C C A T C A G G C A A T A C T G G

mRNA: A A A U G C C G G U A G U C C G U U A U G A C C  

Codon:   AUG   CCG   GUA   GUC   CGU   UAU   GAC    

here we ONLY recognize the start codon but no stop codon.

Anitcodon:  UAC   GGC   CAU   CAG   GCA   AUA   CUG    

Amino Acids: MET - PRO - VAL - VAL - ARG - ILE - LEU

3.

DNA:  T A C G G G C C T A T A C G C T A C T A C T C A T G G A T C G G

mRNA:A U G C C C G G A U A U G C G A U G A U G A G U A C C U A G C C

Codon:   AUG  CCC   GGA   UAU   GCG   AUG   AUG   AGU   ACC   UAG    

here we recognize the start codon and one stop codon.

Anticodon:  UAC  GGG  CCU  AUA  CGC  UAC  UAC  UCA  UGG  AUC

Amino Acids: MET - PRO - GLY - TYR - ALA - MET - MET - SER - THR  

4.

DNA:    G T A C G C G T A T A C C G A C A T T C

mRNA: C A U G C G C A U A U G G C U G U A A G

Codon: AUG   CGC   AUA   UGG   CUG   UAA

here we recognize the start codon and one stop codon.

Anticodon: UAC  GCG  UAU  ACC  GAC  AUU

Amino Acids: MET - ALA - TYR - THR - LEU

---------------------------------------

Related link: brainly.com/question/9598940?referrer=searchResults  

                    brainly.com/question/13923224?referrer=searchResults

Answer:

Explanation:

1. DNA: A T A C G A A A T C G C G A T C G C G G C G A T T C G G

mRNA:  U A U G C U U U A G C G C U A G C G C C G C U A A G C C

Codon:  AUG-CUU-UAG-CGC-UAG-CGC-CGC-CGC-UAA- GCC

Anticodon:  UAC-GAA-AUC-GCG-UAC-GCG-GCG-GCG-AUU-CGG

Amino Acids: Methionine-Leucine-Stop.

2. DNA: T T T A C G G C C A T C A G G C A A T A C T G G

mRNA:   A A A U G C C G G U A G U C C G U U A U G A C C

Codon:  AUG-CCG-GUA-GUC-CGU-UAU-GAC

Anitcodon:  UAC-GGC-CAU-CAG-GCA-AUA-CUG

Amino Acids: methionine-glycine-histidine-glutamine-alanine-isleucine-leucine

3. DNA: T A C G G G C C T A T A C G C T A C T A C T CA T G G A T C G G

mRNA:  A U G C C C G G A U A U G C G A U G A U G A G U A CC U A G C C

Codon:  AUG-CCC-GGA-UAU-GCG-AUG-AUG-AGU-ACC-UAG

Anitcodon:  UAC-GGG-CCU-AUA-CGC-UAC-UAC-UCA-UGG-AUC

Amino acids: Methionine-glycine-proline-tyrosine-alanine-methionine-methionine-serine-threonine.

4. DNA: G T A C G C G T A T A C C G A C A T T C

mRNA:  C A U G C G C A U A U G G C U G U A A G

Codon:  AUG-CGC-AUA-UGG-CUG-UAA

Anitcodon:  UAC-GCG-UAU-ACC-GAC-AUU

Amino Acids: Methionine-arginine-isoleucine-tryptophan-leucine

5. DNA: C G A T A C A A T G G A C C C G G T A T G C G A T A T C C

mRNA: G C U A U G U U A C C U G G G C C A U A C G C U A U A G G

CODON: AUG-UUA-CCU-GGG-CCA-UAC-GCU-AUA

Anticodons- UAC-AAU-GGA-CCC-GGU-AUG-CGA-UAU

Amino acids: Methionine-leucine-proline-glycine-proline-tyrosine-alanine-isoleucine.

As a result of glycolysis, there is a net gain of how many ATPs?

Answers

The answer would be

Two Atp

Answer:

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Explanation:

How doe vertical farming work

Answers

Vertical farming is exactly what it sounds like: a way of farming on vertical surfaces rather than traditional, horizontal farming. By using vertically stacked layers, farmers can produce a great deal more food on the same amount of land.

Results from multiple experiments suggest that the ActA protein of Listeria, an integral membrane protein expressed on the cell surface, is the only bacterial protein that is required for the movement of the bacterium within its host cell. Which combination of the following observations shows that ActA is both, necessary and sufficient for bacterial movement?Please note: E. Coli is not an intracellular bacterium - it does not normally move inside the cytosol, and it does not express ActA.

I. ActA binds to the Arp2/3 complex

II. E. Coli in which ActA is expressed moves in host cell cytosol

III. Listeria lacking the ActA gene fail to move inside the host cell cytosol.

IV. ActA has 3 transmembrane domains

V. Arp2/3, when activated, nucleates a branched actin network

A. I and II

B. II and III

C. I and III

D. III and IV

E. I and V

Answers

Answer:

The correct answer is option B. "II and III".

Explanation:

In order to prove that ActA protein of Listeria is necessary and sufficient for bacterial movement within its host cell a series of results in transformed Listeria and transformed E. Coli must be obtained. First, if Listeria lacking the ActA gene fail to move inside the host cell cytosol it will prove that ActA is necessary for bacterial movement. Second, a transformed E. Coli that expresses ActA should be able to move in host cell cytosol. Wild type E. Coli does not expresses ActA, if ActA alone makes E. Coli able to move in host cell cytosol it will prove that ActA is sufficient for bacterial movement.