Chromosomes line up in the center of the cell

Assignment Help Biology

Reference no: EM13888211

Name:

a. chromosomes line up in the center of the cell

b. Nuclear envelope forms and chromosomes uncoil

c. Chromosomes condense and spindle fibers form

d. Sister chromatids separate and move to opposite poles of the cell

_______, _________, __________, _________

2. A scientist measures the amount of DNA in a cell growing in culture in the lab. The quantity of DNA in the cell would be seen to be double in which of the cases below:

a. between prophase and anaphase of mitosis

b. between G1 and G2 phases of the cell cycle

c. during the M phase of the cell cycle

3. DNA replication results in:

a. Two DNA molecules, one with two old strands and one with two new strands

b. Two DNA molecules, each of which has two new strands

c. Two DNA molecules, each of which has one old strand and one new strand

4. If a strand of DNA has the sequence 5'-CCTAGGTT-3', then the complementary strand of DNA has the sequence:

a. 5'-TTUGGCAC-3'

b. 5'-AACCTAGG-3'

c. 5'-GGATCCAA-3'

d. 5'-CCTAGGTT-3'

5. The DNA of cells is damaged:

a. thousands of times per day

b. by collisions with other molecules, chemical agents and radiation

c. not very often and only by radiation

d. both a and b

6. Which of these DNA repair mechanisms is the least reliable in maintaining DNA stability?

a. Base pair excision

b. Double-strand break repair

c. Homologous recombination

7. Which of the following in an enzyme that is involved in both cell cycle control and DNA repair?

a. cyclin B1

b. BRCA1

c. Cdk2

8. The genetic code:

a. is exactly the same for mitochondrial and nuclear DNA

b. differs slightly between mitochondrial and nuclear DNA because of distinctions in mitochondrial tRNAs

c. differs slightly between mitochondria and nuclear DNA because of differences in mitochondrial RNA polymerase

d. cannot be different between mitochondria and nuclear DNA because mitochondria do not have DNA

In eukaryotic cells, transcription and translation

a. both occur in the nucleus; mRNA remains in the nucleus and ribosomes are imported into the nucleus through nuclear pores

b. both occur in the cytoplasm when the nuclear membrane is temporarily dismantled

c. transcription occurs in the nucleus; mRNA is then exported through nuclear pores and translation occurs in the cytoplasm

d. only occur in the mitochondria

Introns:

a. represent DNA sequences of a gene that are translated into protein

b. represent DNA sequences of a gene that are not translated into protein

c. are found more frequently in eukaryotes than bacteria

d. are found more frequently in bacteria than in eukaryotes

e. a. and c.

f. b. and c.

What determines the nucleotide sequence of an RNA strand?

a. Complementary base pairing with the template DNA strand during transcription

b. The amino acid sequence in a protein

c. The diversity of nucleotides available to RNA polymerase

An RNA molecule elongates in which direction?

a. 5' to 3'

b. 3' to 5'

Bacterial mRNAs

a. Are translated as soon as they are exported from the nucleus

b. Are transcribed and translated simultaneously

c. Are processed in the same way as eukaryotic mRNAs

Multiple RNA transcripts can be generated from a single DNA template

a. True

b. False

Within the ribosome, formation of peptide bonds is catalyzed by

a. Aminoacyl-tRNA-synthetase

b. The tRNA itself

c. An RNA molecule in the large ribosomal subunit

d. A peptidase in the small ribosomal subunit

Which region of the protein is synthesized first by ribosomes

a. The N-terminus

b. The C-terminus

Consider the DNA sequence shown below. If RNA polymerase uses the top strand as its template, what will the sequence of the RNA molecule produced be? Remember to label the 5' and 3' ends.'-ATGACGAAAAGA-3' ||||||||||||3'-TACTGCTTTTCT-5'

18. Proteins in the cytosol that are destined for other organelles must first enter the:

a. nucleus

b. Golgi apparatus

c. Endoplasmic reticulum

d. Lysosomes

19. Which of the following is true?

a. a special class of ribosomes embedded in the ER translates the proteins destined for that organelle

b. a common pool of ribosomes is used to synthesize both proteins that stay in the cytosol and those that are destined for the ER

c. all ribosomes are attached to the ER when they are synthesizing a protein

20. Which type of protein binds to improperly folded or improperly assembled proteins in the ER, holding them there until proper folding occurs?

a. tethering proteins

b. glycosylating proteins

c. chaperone proteins

d. antibody proteins

21. Which of the following is NOT true about the differences between liver cells and kidney cells in the same organism?

a. they contain the same genes, but express them differently

b. they contain different genes

c. they contain different sets of proteins

22. The correct order of the "flow of information" to generate a protein is:

a. mRNA to DNA to protein

b. DNA to mRNA to protein

c. Lipid to mRNA to protein

23. In a eukaryotic cell, almost all _________________ occurs in the nucleus and __________________ occurs mainly at ribosomes in the cytoplasm. Fill in the blanks by picking from the following terms:

a. translation

b. transcription

24. A stop-transfer sequence functions to:

a. block transfer of a hydrophobic amino acid sequence into the lumen of the endoplasmic reticulum

b. prevent ribosomes from binding to the rough endoplasmic reticulum

c. signal the termination of mRNA

25. A highly expressed gene is more likely to be found in a(n)________________ region of the chromosome.

a. Heterochromatic

b. Euchromatic

26. The ___________ directs the ribosome with the attached mRNA and nascent polypeptide to the endoplasmic reticulum membrane.

a. tRNA

b. signal peptidase

c. SRP

d. SRP receptor

27. Which is NOT an example of epigenetic inheritance?

a. the inheritance of methylation patterns in DNA

b. the inheritance of a single nucleotide mutation in a gene

c. the inheritance of patterns of chromosome condensation

Reference no: EM13888211

Questions Cloud

What kind of society replaced that of the creeks-choctaw : Why did Jackson and his followers insist on the removal of Indians from the Southeast (and places like soutwest Georgia)? What kind of society replaced that of the Creeks, Choctaw, Tuskegee, Seminole, and Apalachee?

Draw the consumers budget line : Calculate a function M(α), which shows the maximized value of f that can be achieved, given any real number α. Is this function continuous? Assume that a consumer has the utility function U(x,y) = 3x+y, where x and y represent the quantities of two g..

Explain the roles of transcription and translation : Explain the roles of transcription and translation in converting the DNA message to a protein?

Chromosomes line up in the center of the cell : Chromosomes line up in the center of the cell b. Nuclear envelope forms and chromosomes uncoil c. Chromosomes condense and spindle fibers form

Change in supply and change in the quantity supplied : The Commerce Department is considering lifting the ban on the import of Brazilian oranges (the world’s largest producer of oranges) into the United States. In your explanation, be sure to distinguish between a change in demand and a change in quantit..

More impact with their advertising : 1.Some national advertisers have found that they can have more impact with their advertising by running a large number of ads for a period and then running no ads at all for a period.

If inventories unexpectedly rise then production : If inventories unexpectedly rise then production _____ sales and firms will respond by______

Describe the relationship between bus rides and gasoline : In Atlanta, the price elasticity of demand for bus rides is -0.5, the income elasticity of demand for bus rides is -0.1 and the cross price elasticity of demand for bus rides with respect to gasoline is 0.2. Describe the relationship between bus ride..

User Account

All Pages