Biology Lab questions Based on a slide of lamp brush chromos

Biology Lab questions:

Based on a slide of lamp brush chromosomes: Chromosomes such as these are located in the cell\'s A). Cytoplasm B). Plasma Membrane C). Mitochondria D). Nucleus

Based on a slide of loop or lamp brush chromosomes: The messenger RNA seen in this slide is made of the compounds A). Adenine, guanine, cytosine, and thymine. B). Adenine, uracil, thymine, and cytosine. C). Guanine, adenine, cytosine, and uracil. D). Alanine, guanine, thymine, and cytosine.

Based on a slide of Giant chromosomes:

Compare these chromosomes (giant chromosomes) with those in the lamp brush chromosomes. Then complete these statements: A). A similarity between both types of chromosomes is that____ (under scores are where the answer is supposed to be).

B). One difference between the two types of chromosomes is that_____.

Based on a slide of nuclear pores:

DNA never leaves the nucleus; instructions to the cytoplasm are given by the A). Transfer RNA B). Radioactive uracil C). template RNA D). messenger RNA

Based on a slide of ribosomes:

Units of amino acid are carried to the ribosomes by A). Transfer RNA B). Radioactive uracil C). Template RNA D). Messanger RNA

The ribosomes are sites of A). Protein manufacture B). Digestion C). Meiosis D). Chromosome replication.

Solution

1. chromosomes, whatever the type mat be, they are located in cell\'s nucleus.

2. messenger RNA contains (C) guanine, adenine, cytosine and uracil.

RNA would not contain thymine.Thymine in DNA would be replaced by uracil.

3. the similarity between these two (polytene and lampbrush) chromosomes is that both of them are giant chromosomes. the DNA in the chromosomes are extended. the transcriptional activity of both the DNA is high.

4. the difference between these two chromosomes is that polytene chromosomes are present in salivary glands of fruit fly, whereas, lampbrush chromosomes are present in oocytes of animals except mammals.

5. instructions to the cytoplasm are given by messenger RNA. mRNA is the connecting link between DNA in the nucleus and proteins formed in cytoplasm.

6. the ribosomes are sites of protein synthesis or manufacture.