PCB3023 EXAM 1, CELL BIO TEST 1 FAU THEISEN, CH.1: CELLS

PCB3023 EXAM 1, CELL BIO TEST 1 FAU THEISEN, CH.1: CELLS

AND GENOME newest actual / QUESTIONS AND

ANSWERS

2. In cells the strongest chemical interaction is: - ----

Answers----covalent bonds

3. The majority of biological catalyst are made from: - ----

Answers----AA

In the A,B,C class of protein Transport pump. The conformation changes that lead to translocation of the transporter

substance are caused by: - ----Answers----repeating cycles

of ATP binding & hydrolysis

Which of the following is false regarding prokaryotic cells? - - ---Answers----Synthesis histone proteins

Evolution of the nucleus in eukaryotic organisms has allowed:

• ----Answers----Segregation of DNA from other cellular

processes & increase the size of the DNA molecule

When a carbohydrate is oxidized it loses both ____and ____. - -- --Answers----Electrons & energy

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Telomerase functions to: - ----Answers----Mask the end of

linear chromosomes to prevent accidental repair

According to the book telomeres forms structures the protect the end of chromosomes from being mistaken by cells for a broken DNA molecule in need of repair. - ----Answers---- Heteroduplex formed during mitotic combination

What is meant by high specificity between molecules - ---- Answers----Highly complementary physical shape & highly complementary electro chemical properties

The histones used to package newly replicated DNA: - ----

Answers----Added to DNA as it is emerging from the replication machinery

Mutations within DNA coding regions: - ----Answers----

Usually results to deleterious changes in protein structure

Entropy is the measure of: - ----Answers----The amount of

disorder in a system

A protein secondary structure is maintained by: - ----

Answers----Hydrogen bonds

Binding of a ligand to a specific enzyme binding site: - ----

Answers----Involve numerous weak noncovalent bonds 2 / 4

Chemical analysis of DNA will reveal the following - ---- Answers----Concentration of Purines equals concentration of pyrimidines

Because it is circular, replication of prokaryotic DNA does not require - ----Answers----Telomerase function

Flipping out refers to: - ----Answers----The temporary

separation of a base from its compliment to allow close inspection

Activation energy is a property of: - ----Answers----All types

of chemical reactions

Which of the following is not a universal feature of all cells? - ----Answers----Use energy from sunlight to store macromolecules

Hydrophobic side chains on the outside of a protein will

indicate: - ----Answers----A misfolded protein

Many protein catalyzes utilize both acids and bases by: - ----

Answers----Using properties of both simultaneously

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Hydrogen bonds are common in cells because: - ----

Answers----Many of the covalent bonds involving hydrogen are polar

Protein homologous found in the same organisms which have

different functions are the result of: - ----Answers----Gene

duplication events

Introns are: - ----Answers----noncoding regions of mRNA

molecules

The processes of replication will be best described as: - ----

Answers----A fast error prone processes that relies on repair mechanisms

Retroviruses: - ----Answers----Codes for an enzymes called

RT, codes for protein which provides a protective coding, odes for global genetic elements

Which of the following will involve an unfavorable reaction? - - ---Answers----Pyrimidine dimerization

A protein: - ----Answers----Facilitates directive branch

migration during recombination and possesses multiple DNA binding sites

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