Question

QUESTION 10

Genes influence all aspects of life because they

are needed for DNA synthesis.

localize to the nucleus.

produce RNA and protein needed for different processes.

are structural elements of the cell.

regulate movement of proteins.

QUESTION 11

1. The contribution of Gilbert and Sanger to modern genetics was to:

   	A.	develop a method for sequencing DNA.
   	B.	describe the structure of DNA.
   	C.	show that genes were made of DNA.
   	D.	discover DNA in the nucleus of cells.
   	E.	develop the PCR technique.

QUESTION 12

1. Preimplantation genetic testing involves:

   	A.	removing cells from a fetus, testing them for a genetic disorder, and then allowing abnormal fetuses to be aborted.
   	B.	testing primary oocytes (eggs) for genetic disorders before using them for in vitro fertilizations.
   	C.	testing a newborn infant for a genetic disorder immediately after birth.
   	D.	testing multiple sperm from a man who is heterozygous for a serious genetic disorder and then using only sperm that have normal alleles for in vitro fertilizations.
   	E.	testing a single cell of an early embryo for a genetic disorder before the embryo is considered for implantation into the mother's uterus.

Answer 1

Solution:-

10) Genes are the instructions that dictate how a person's body is made up. Instructions from gene will let the body which trait or characteristic a person will have. This is why, Genes influence all aspects of life because they produce RNA and protein needed for different processes.

So, the correct option is (c).

11) DNA sequencing refers to the methods for determining the order of nucleotides bases adenine, guanine, cytosine and thymine in a molecule of DNA. There are two main methods of Gilbert and Sanger. One is Gilbert chemical method in which technique depends on relative chemical liability of different nucleotide bonds whereas Sanger method interrupts elongation of DNA sequence by incorporating dideoxynucleotides into the sequence. Second is chain termination method which is used for its speed and simplicity.

The method devised by Sanger and Gilbert made it possible to read the nucleotide sequence for entire gene which run from 1,000 to 30,000 bases long.

So, the correct option is (a) develop a method for sequencing DNA.

12) Preimplantation genetic testing is a testing used to identify genetic defects in embryos created through in vitro fertilization before pregnancy.

So, the corect option is (e).