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Bio Questions, Help please!?

NTC — Wed, 14 Jul 2010 19:23:52 +0000

Polymerase chain reacton is used to
a) cleave DNA
b) insert DNA
c) copy DNA
d) protect DNA
What is the purpose of a test cross?
a) produce offspring that consistently exhibit a specific trait
b) check for carriers of a trait
c) explain recessiveness
d) show polygenic inheritance
The goal of a gene therapy is to insert a _______into cells to correct a genetic disorder.
a) recessive allele
b) growth hormone
c) dominant allele
d) normal allele
restriction enzyme EcoRI cuts DNA strands, leaving____ends.
a)sticky
b) smooth
c) blunt
d) linked
_____usually increases the appearance of genetic disorders.
a) cloning
b) inbreeding
c) PCR
d) gene therapy
Cells in a cell culture all have the same genetic material because they are__
a)vector
b) plasmids
c) hybrids
d)clones
~What is the potential use of a map showing the sequence of DNA bases in a human chromosome?
~Assume that transgenic organisms can be developed to speed nitrogen fixations. How might use of these organisms affect an ecosystem?
~How might transgenic organisms alter the course of evolution for species?

please help i have homework and i dont get it, if any one can help that would be great
easy 10 points for those who are good at bio!! :]]
thnk u

Bio Questions, Help please!? is a post from: Nature Technology Corporation

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The bacterial chromosome:?

NTC — Thu, 08 Jul 2010 18:36:36 +0000

a. is part of the nucleoid

b. forms a single linear strand of DNA

c. all of the choices are correct

d. contains all the cell’s plasmids

e. is located in the cell membrane

The bacterial chromosome:? is a post from: Nature Technology Corporation

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biology help please?

NTC — Tue, 22 Jun 2010 15:23:50 +0000

1. Your complete DNA sequence makes up your ___________.

A. genome
B. recombinant DNA
C. DNA fingerprinting
D. DNA chimera
2. Bacteria contain small circular molecules known as ___________.

A. mutagens
B. restriction enzymes
C. plasmids
D. capsids
3. The cross between an orange and a grapefruit to produce a tangelo is an example of ___________.

A. selective breeding
B. inbreeding
C. sequencing
D. genetic engineering
4. The phenomenon that results when individuals from different species are crossed to produce a species hardier than either parent is ___________.

A. genetic engineering
B. biotechnology
C. recombinant DNA
D. hybrid vigor
5. Which of the following fix nitrogen into a form that plants can use?

A. Ti plasmids
B. pellets
C. plasmids
D. nodules

biology help please? is a post from: Nature Technology Corporation

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biology questions! :)?

NTC — Mon, 21 Jun 2010 15:25:34 +0000

A strand of DNA formed by the splicing of DNA from two different species is called ___________.
Choose one answer.

a. determinant DNA

b. recombinant DNA

c. plasmid

d. restriction DNA

A family has four girls and two boys. Both of the boys have hemophilia. The parents go to see a genetic counselor, which tells them that hemophilia is carried on the X chromosome. This is an example of __________.
Choose one answer.

a. a sex-linked trait

b. incomplete dominance

c. codominance

d. dominance

DNA fingerprinting uses the fact that individuals have different numbers of ___________.
Choose one answer.

a. genes in their Y chromosomes

b. genes in their X chromosomes

c. repeating units

d. chromosomes

Which of the following is used to make crop plants resistant to herbicides?
Choose one answer.

a. Ti plasmids

b. pellets

c. plasmids

d. nodules

biology questions! :)? is a post from: Nature Technology Corporation

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All of the following involve molecular biology techniques except…?

NTC — Sat, 19 Jun 2010 15:25:36 +0000

A) Cutting and rearranging the DNA
B) Using restriction enzymes to cut specific sequences of DNA
C) Cloning the genes into the host organism
D) Using any cell as a vector

All of the following involve molecular biology techniques except…? is a post from: Nature Technology Corporation

Technorati Tags: dna c, Genes, host organism, restriction enzymes, sequences, vector

Biology Help – plant cells, and retrovirus?

NTC — Mon, 14 Jun 2010 16:25:12 +0000

20. Plant cells that have had the cell walls removed are called ______.
a. plasmids
b. probes
c. vectors
d. protoplasts
e. transgenic

21. A retrovirus has ______ genes.
a. RNA
b. DNA
c. bacterial
d. defective
e. no

22. A retrovirus used in gene therapy works by ______.
a. replacing the patient’s genes with normal viral genes
b. replacing the patient’s DNA with viral RNA
c. using reverse transcription to produce normal human DNA
d. using reverse transcription to produce normal human RNA
e. using polymerase chain reaction to produce normal human DNA

Biology Help – plant cells, and retrovirus? is a post from: Nature Technology Corporation

Technorati Tags: cell walls, chain reaction, dna c, gene therapy works, human dna, plant cells, Plasmids, polymerase chain reaction, probes, protoplasts, retrovirus, reverse transcription, transgenic, vectors, viral genes, viral rna

Can anyone help me with these biology questions? (8th Grade)?

NTC — Thu, 13 May 2010 04:09:44 +0000

1. Trisomy 21 is a condition usually caused by:

a. Down syndrome
b. Nondisjunction
c. Chromosome deletion
d. Chromosome inversion

2. The Human Genome Project can help genetic engineers produce human proteins because __________

a. identical twins have identical DNA.
b. the Human Genome Project has determined the structure of transfer RNA.
c. the Human Genome Project has determined the structure of human proteins.
d. to produce a protein, geneticists must know the sequence of DNA bases that codes for the protein.

3. What is the purpose of the Human Genome Project?

a. to identify the DNA sequence of every gene in the human genome
b. to clone every gene on a single chromosome in human DNA
c. to cure genetic diseases
d. to inbreed the best genes on every chromosome in human DNA

4. What is a genome?

a.all the cells produced during meiosis
b.all the plasmids produced from inserting DNA into a cell
c.all the DNA in one cell of an organism
d.all the karyotypes in a cell
First person to answer them all right gets 10 points.

Can anyone help me with these biology questions? (8th Grade)? is a post from: Nature Technology Corporation

Technorati Tags: cell c, chromosome deletion, chromosome inversion, dna c, dna sequence, down syndrome, genetic diseases, genetic engineers, geneticists, human dna, human genome project, human proteins, identical dna, identical twins, karyotypes, nondisjunction, Plasmids, transfer rna, trisomy 21, what is a genome

All of the following involve genetic engineering techniques except?

NTC — Thu, 13 May 2010 02:08:06 +0000

10.All of the following involve genetic engineering techniques except
A.cutting and rearranging the DNA
B.using restriction enzymes to cut specific sequences of DNA
C.cloning the genes into the host organism
D.using any cell as a vector
E.only a, b, and c are correct

All of the following involve genetic engineering techniques except? is a post from: Nature Technology Corporation

Technorati Tags: dna c, Genes, genetic engineering techniques, host organism, restriction enzymes, sequences, vector

Can anyone help me with these biology questions? (8th Grade)?

NTC — Mon, 10 May 2010 04:10:16 +0000

1. Trisomy 21 is a condition usually caused by:

a. Down syndrome
b. Nondisjunction
c. Chromosome deletion
d. Chromosome inversion

2. The Human Genome Project can help genetic engineers produce human proteins because __________

3. What is the purpose of the Human Genome Project?

4. What is a genome?

Can anyone help me with these biology questions? (8th Grade)? is a post from: Nature Technology Corporation

Can anyone help me with these biology questions? (8th Grade)?

NTC — Sun, 09 May 2010 08:58:30 +0000

1. Trisomy 21 is a condition usually caused by:

a. Down syndrome
b. Nondisjunction
c. Chromosome deletion
d. Chromosome inversion

2. The Human Genome Project can help genetic engineers produce human proteins because __________

3. What is the purpose of the Human Genome Project?

4. What is a genome?

a.all the cells produced during meiosis
b.all the plasmids produced from inserting DNA into a cell
c.all the DNA in one cell of an organism
d.all the karyotypes in a cell

Can anyone help me with these biology questions? (8th Grade)? is a post from: Nature Technology Corporation