Bioo

When the surface shape of an enzyme is changed by heat and rendered nonfunctional the change is called

• Hemolysis

• Crenation

• Denaturation

• Hydrolysis

Which of the following statements best describes the replication of DNA?

• the double Helix is cut at the phosphate bonds and new nucleotides pair with the appropriate (correct) sugars

• The double Helix opens up by breaking of the hydrogen bonds between bases a G nucleotide pairs with a G and a C nucleotide pairs with a C, etc

• The DNA is completely fragmented by restriction enzymes and rebuilt using the information provided by the amino acid sequence of cell proteins

• The double Helix opens up by breaking hydrogen bonds between nitrogen bases and a new nucleotide pair with the complementary bases in the old strands.

• The double Helix opens up and RNA forms base pairs with the complementary strand of DNA

The relationship between the bases is an mRNA molecule and the sequence of amino acids in a polypeptide is specified (determined) by the

• Periodic table

• DNA polymerases

• Genetic code

• RNA polymerases

• Central dogma

Which statement about mitosis and cytokinesis is TRUE?

• At the end of mitosis there are two daughter cells with half the number of chromosomes as the parent cell.

• At the end of mitosis and cytokinesis there are two daughter cells that are diploid

• At the end of mitosis there are two daughter cells that are haploid

• at the end of cytokinesis there are two daughter cells with half the number of chromosomes as the parent cell

• At the end of mitosis, the sister chromatids have not yet separated.

At the end of meiosis I (not meiosis II)

• 2 cells are haploid and the homologous pairs are in separate cells.

• Sister chromatids are in separate cells

• 4 cells are haploid.

• 2 cells are diploid.

• the homologous pairs are in 4 separate cells

The molecule that directly converts (changes) in NADP+ to NADPH is

• NADP+ reductase

• RUBISCO

• Cytochrome complex

• Plastocyanin

• Ferrodoxin

When a molecule of NAD+ plus gains a hydrogen atom the molecule is reduced

• True

• False

If the sequence for one strand of DNA is 3’-TCGATT-5’ then its complementary strand would have a sequence of 3’-AGCTAA-5’

• True

• False

In eukaryotes the structure that is used for protein synthesis is the

• Nucleolus

• Mitochondrion

• Plasma membrane

• Ribosome

Assign the correct steps of gene expression in a eukaryotic cell.

1) Transcription

2) RNA processing

3) mRNA moves out of nucleus

4) mRNA binding with ribosome

5) Termination of translation

• 2,3,1,4,5

• 1,2,3,4,5

• 1,3,2,4,5

• 1,2,3,5,4

• 5,2,3,4,1