BIO 1109 Lecture Notes - Lecture 16: Nitrogenous Base, Deoxyribose, Cytosine

58 views5 pages

ochreotter380

18 Oct 2015

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Hydrogen bonds between these pairs keep strands together. Genetic code determined by sequence of pairs of nitrogenous bases. Each side of dna forms a template for the new daughter strand. Dna polymerases are enzymes which make covalent bonds between nucleotides on new strand. 1. enzymes start breaking hydrogen bonds between nitrogenous bases at origins of replication. 2. dna polymerases assemble daughter strands by matching complementary nucleotides to the parent strand. These nucleotides come from a stockpile in the nucleus. A short section of dna that codes for a protein. Specific code at a gene site, the sequence of nitrogenous bases. One allele differs from another because of different sequences of nitrogenous base pairs. Structure-polypeptide chain- sequence of 20 different amino acids. Each protein has a unique sequence of amino acids. The unique sequence gives the protein its shape and determines its function. Each gene is a unique sequence of nitrogen base pairs. If genotype is: then phenotype is: dna, dna, dna.

Related Questions

Which one of the following DNA bases are complementary:

Select one:

a. thymine and guanine

b. guanine and uracil

c. cytosine and adenine

d. adenine and guanine

e. adenine and thymine

Saturated fats:

Select one:

a. exist as solids at room temperature

b. exist as liquids and are derived from plants

c. have two fatty acid chains

d. contain many double bonds

e. are formed from 4 interlocking carbon rings

Which of the following is an example of an inorganic molecule:

Select one:

a. a fatty acid

b. RNA

c. cholesterol

d. an amino acid

e. sodium chloride

1.Which of the following is not true about DNA? a) it is found both in the nucleus and the cytoplasm b)it is double stranded and the standards are connected by hydrogen bonds between the base pairs c) A purine base always pairs with a pyrimidine base to make up the DNA code d) it is the control center for both cell activity and heredity 2.Which of the following represents accurate base pairing in DNA ?a) Adenine to Adenine b)Adenine to Uracil c)Thymine to Cytosine d)Adenine to Thymine 3. Purines and Pyrimidines are found a) DNA only b)RNA only c) A and B d)In proteins 4.The bond that forms between carbohydrates is called a)peptide bond b) ester bond c) glycoside bond d)never ending bone 5. Which of the following does not dissolve readily in water? a)proteins b) amono acids c) steroids d) carbohydrates 6. The following arrangement of amino acids represents what level of structure ? ABACABDD a)Primary b)Secondary c)Tertiary d)Quaternary

cerisedog238

QUESTION 1. Compared to eukaryotic genomes, only prokaryotic genomes:

A. contain DNA organized by histones.

B. contain usually one, circular chromosome.

C. contain plasmid DNA.

D. have chromosomes contained in a nucleus.

QUESTION 2. Azathioprine is a drug that may be prescribed to transplant recipients to reduce the chance of tissue rejection reactions. In its active state, it acts as a purine analogue, inhibiting DNA biosynthesis. This means that 6-mercaptopurine will be inserted in place of a purine containing nucleotides during DNA replication. Given this drug's mode of action, you would expect it to be incorporated into DNA in place of:

A. nucleotides containing guanine or cytosine.

B. nucleotides containing adenine or thymine.

C nucleotides containing adenine or guanine.

D. nucleotides containing guanine nucleotide or uracil.

QUESTION 3. RNA is distinguished from DNA because only RNA:

A. typically exists as a single-stranded molecule.

B. has a 3' to 5' directionality.

C. is composed of nucleotides that contain the sugar deoxyribose.

D. is composed of nucleotides that contain the nitrogen bases T, C, G, and A.

QUESTION 4. How are RNA nucleotides different from DNA nucleotides? To be marked correct, you'll need to select all true statements, as there may be more than one correct answer.

A. RNA nucleotides do not contain thymine.

B. RNA nucleotides use the sugar ribose, while DNA nucleotides do not.

C. RNA nucleotides lack phosphate.

D. RNA nucleotides incorporate pyrimidine nitrogen bases, while DNA nucleotides only incorporate purine nitrogen bases.

BIO 1109 Lecture Notes - Lecture 16: Nitrogenous Base, Deoxyribose, Cytosine

Document Summary

Get access

Related textbook solutions

Molecular Cell Biology

Biology: Science for Life with Physiology

Concepts of Biology

Biology

Essentials of Biology

Related Documents

BIO 1109 Study Guide - Phosphodiester Bond, Hydrogen Bond, Dna Replication

Related Questions