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kogti [31]
3 years ago
11

You can be infected with a virus and not even know it. a. True b. False

Biology
2 answers:
stepladder [879]3 years ago
7 0
That would be true. Unless there is symptoms and signs a virus can go undiagnosied for long periods of time. For example, some viruses have a period of what is called latency which is when the virus is at low levels and reproducing slowly and few people will have symptoms. Some viruses that have these periods are HIV, HSV 1, retroviruses.
Alex Ar [27]3 years ago
3 0
You can be infected with a virus & not even know it & that is true
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Based on these concepts, choose statements that correlate Mendel's four postulates with what is now known about genes, alleles,
Vikentia [17]

Answer:

Explanation:

Mendel four postulate is Principles of Paired Factors, Principle of Dominance, Law of Segregation which is Mendels First Law of Inheritance and Law of Independent Assortment which is Mendel’s Second Law of Inheritance.

The six possible outcome are,

3. Alleles segregate from each other during gamete formation at anaphase I gene assorts independent of each other during gametes formation.

4. Some genes have dominant and recessive alleles. Allele of a gene can either be dominant or recessive in its form

7. Unit factors occur in pairs , allele of a gene occur in pair

Dominant alleles can become codominant alleles during mitosis, when two allele both finds expression in the phenotype of an organism they are codominant

8. One gene pair separates independently from other gene pairs independent assessment of gene.

5. Different gene pairs on nonhomologous chromosomes will separate independently from each other during meiosis.

5 0
3 years ago
What structure is most important in forming the tetrads?
Vladimir79 [104]

Answer:

The correct answer will be option- synaptonemal complex.

Explanation:

The tetrad arrangement of the genetic material in an organism is mediated by a highly conserved structure known as the synaptonemal complex.  The synaptonemal complex is formed during the prophase I of the meiosis I which attaches the chromatin of the homologous chromosomes.

The synaptonemal complex is a proteinaceous structure which is formed by the two lateral ladders like elements with a central portion composed of the central element. The chromatin gets attached to the lateral elements while the central a portion bridge space between the two ladders thus help in the formation of the tetrad.

Thus, option- synaptonemal complex is the correct answer.

4 0
3 years ago
Place all eight of these steps of the insulin signaling pathway in the correct order. The abbreviation PIP 2 is used for phospha
DedPeter [7]

Answer:

The correct insulin pathway is described as under:

2. Binding of insulin to the alpha subunit of the insulin receptor

8. Activation of insulin receptor tyrosine kinase

3. Phosphorylation of IRS proteins

6. Phosphorylation of phosphinositide 3-kinase (PI-3K)

4. Conversion of PIP2 to PIP3

7. Activation of PIP3-dependent protein kinase B (PDK1)

5. Glut4 receptors transported to the cell membrane

Explanation:

The insulin signaling pathway is described as under:

RTK (receptor tyrosine kinases) which is a receptor for insulin is an extracellular receptor but in contrast to other cell surface receptors it is catalytic in nature. In the absence of insulin (ligand), it is monomeric but as soon as it gets activated (activation occurs upon ligand binding), it undergo dimerization. It leads to auto-phosphorylation in it's tyrosine residue which subsequently leads to phosphorylation of tyrosine residue of other receptors. Such hyper-phosphorylated receptor have high affinity with enzyme/molecule like IRS protein which have SH2 domain . IRS down stream activates phosphinositide 3-kinase (PI-3K). This enzyme converts component of animal cell membrane PIP2 into PIP3. PIP3 also remains membrane bound but it has the potential to phosphorylate another enzyme named as PIP3-dependent protein kinase B (PDK1). Further, PDK1 leads to the activation of Akt or PK-B. Akt is a serine-threonine kinase which ultimately leads to the recruitment of Glut4 receptors on cell membrane for uptake of more and more glucose into the cell.

Note: Apart from this Akt also phosphorylates another protein named as FOXO which ultimately causes cell growth, Akt can also phosphorylate BAD protein so as to restrict cell apoptosis or we can say it leads to cell survival, Akt also leads to translation in a cell with the help of mTOR raptor etc.  

5 0
3 years ago
What is the function of a motor neuron?
Ber [7]
C. The brain sends messages to the spinal cord
6 0
3 years ago
. Which of these is a response of cats to external stimuli?
Step2247 [10]

Answer:

A. hairs on the back stand up when scared

Explanation:

B and C are not responses to stimuli, and D is a response to internal stimuli

7 0
2 years ago
Read 2 more answers
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