Question

QUESTION 33 1. How do we see the hybridized spots on an array?

a) the spots are just big enough for us to see b) the cDNA or mRNA probe has been labeled with a fluorescent tag that the computer can detect c) the spots turn orange d) only the hybridized spots stay on the chip a. only the hybridized spots stay on the chip b. the cDNA or mRNA probe has been labeled with a fluorescent tag that the computer can detect c. the spots turn orange d. the spots are just big enough for us to see 10 points

QUESTION 34 1. which of the following describes a clone

a. All answers are correct b. The DNA of a clone is identical to the DNA of a parent c. clones can be made in plants d. clones can happen naturally

Answer 1

Answer 33:

DNA microarray is a technique in which about a thousand genes can be studied at the same time. The genes (cDNA) to be studied are spotted on a solid surface and fluorescent labelled mRNA molecules (collected from a cell) are allowed to hybridize at each spot.

Upon hybridization, the spot shows fluorescence, which is scanned and detected using a computer.

Thus, the correct choice should be:

(b) the cDNA or mRNA probe has been labeled with a fluorescent tag that the computer can detect.

Answer 34.1:

A clone can be defined as an identical copy of an entity, such as cell or an individual. In nature, asexual reproduction produces progeny which are clones of each other. Also, clones have the same DNA as that of the parent.

The correct choice should be:

a. All answers are correct.