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Brums [2.3K]
2 years ago
9

1.Are spindle fibers present during telophase 1?

Biology
1 answer:
mina [271]2 years ago
6 0

Answer:

During telophase nuclear membrane is formed, nucleolus appears and astral rays disappear.

During telophase, the effects of prophase and prometaphase - the nuclear membrane and nucleolus disintegrating are reversed. Two daughter nuclei form in each daughter cell, and phosphatases dephosphorylate the nuclear lamins at the ends of the cell, forming nuclear envelopes around each nucleus.

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Clasificați Sistemul nervos din punct de vedere: topografic si functional
Anon25 [30]

Answer:

Topographically SN is classified into:

1. Central SN- made up of the brain and spinal cord

2. Peripheral SN- made up of nerves (31 pairs of spinal nerves, 12 pairs of cranial nerves), nerve plexuses and nerve ganglia

Structural Dpdv

1. Somatic SN \ of relationship life

2. Vegetative SN a) sympathetic- acts in unusual conditions (eg stress, fear)

b) parasympathetic- acts in normal life conditions

Explanation:

4 0
2 years ago
Most studies indicate that tobacco and marijuana tend to be a. substitutes. b. complements. c. unrelated because one good is leg
koban [17]
<h2>Answer is option "b"</h2><h3>Explanation:</h3>
  • The complement systems are a key natural insusceptible barrier against disease and a significant driver of irritation; in any case, these very properties can likewise cause hurt. Unseemly or uncontrolled initiation of compliment can cause nearby as well as fundamental irritation, tissue harm and ailment.
  • Complement gives various choices to tranquilize advancement as it is a proteolytic course that includes nine explicit proteases, one of a kind multimolecular enactment and lytic edifices, a stockpile of characteristic inhibitors, and various receptors that dilemma to actuation sections.
  • Medication configuration is encouraged by the undeniably itemized basic comprehension of the atoms associated with the complement system. Just two enemies of compliment drugs are as of now available, however, a lot more are being produced for sicknesses that incorporate irresistible, provocative, degenerative, horrible and neoplastic disorders.
  • Hence, the right answer is option b "Complements".\

5 0
3 years ago
You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make l
Blizzard [7]

Answer:

The options A, B, and D are all valid.

Explanation:

  • The reason is that some proteins require molecular chaperones if they are to fold properly within the environment of the cell. In the absence of chaperones, a partially folded polypeptide chain has exposed amino acids that can form non-covalent bonds with other regions of the protein itself and with other proteins, thus causing nonspecific aggregation of proteins.
  • The option A) is correct because the protein you are expressing in bacteria is being made in large  quantities, it is possible that there are not enough chaperone molecules in the  bacterium to fold the protein. Expressing the protein at lower levels might  increase the amount of properly folded protein.
  • The option B) is correct as urea should solubilize the protein and completely unfold it. Removing the urea  slowly and gradually often allows the protein to refold. Presumably, under less  crowded conditions, the protein should be able to refold into its proper  conformation.
  • The option C) is not correct as treating the aggregate with a protease, which cleaves peptide bonds, will probably  solubilize the protein by trimming it into pieces that do not interact as strongly with  one another; however, chopping up the protein will also destroy its enzymatic activity.
  • The option D) is correct because overexpressing chaperone proteins might increase the amount of properly folded protein.
  • The option E) is not correct as heating can lead to the partial denaturation and aggregation of proteins to form a solid gelatinous mass, as when cooking an egg white, and rarely helps solubilize proteins.

7 0
3 years ago
How do conservation tillage practices in agriculture benifit the soil?
barxatty [35]
B. They decrease water absoption
4 0
2 years ago
Chlorophyll is an accessory pigment in plants.<br><br><br> True<br><br> False
Phantasy [73]

Answer:

True

Explanation:

it is a pigment used in the process of photosynthesis and also gives the plant it's green colour.

4 0
2 years ago
Read 2 more answers
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