BIO SCI 93 Study Guide - Final Guide: Tumor Suppressor Gene, Isotopes Of Nitrogen, Tomato Juice

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BIO SCI 93 Full Course Notes

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A) m: s, g1, g2, g0, will inhibit viral reproduction, will prevent cell cycle inhibition, will cause a cell to enter g0, will cause flu like symptoms. Dna. of dna. of dna. amount of dna. amount of dna: you have in your possession a microscope slide with meiotic cells on it and a light microscope. What would you look for if you wanted to identify metaphase i cells on the slide: black fur in mice (b) is dominant to brown fur (b). Short tails (t) are dominant to long tails (t). What fraction of the progeny of the cross bbtt bbtt will have black fur and long tails: bacteria grown in 15n are placed in 14n media. Dna is isolated and centrifuged in a cscl gradient. For questions 31 to 34, refer to figure 48. 1: the membrane"s permeability to sodium ions is at its maximum at label.

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1.A mutation occurs in a cell to cause its SH2 domains to be constantly activated. What is the result of this mutation? a. The cell will become senescent and cease to go through the cell cycle b. The cell will no longer be able to complete mitosis because of compromised spindle fibers c. The cell will experience continuous division. d. The cell will create increased G-Protein receptor density at the cell membrane surface, leading to sensitization to ligands released in the intercellular space. e. Nothing will change.

2. Which of the following catalyzes the transformation of ATP to cAMP? a. Adenylyl cyclase b. Phosphorylase c. Protein Kinase d. Phosphoinositol Phospholipase e. Diacyl glycerol

3.During which phases of the cell cycle does the cell have double the amount of DNA? a. G1 and G2 phase b. S and G1 phase c. G2 and Early M phase d. G2 and Late M phase e. G1 and Late M phase

4. Which of the following is a likely reason for apoptosis to occur in a cell? a. The cell is part of a structure that is being modified during development. b. The cell merges with another cell (ex: a sperm and egg cell. c. An error occurred when the cell's DNA was being replicated. d. The organism is growing quickly. e. a and c

1. Which of the following components is responsible for the hydrophobic character of GTP? a. ribose b. phosphate c. guanine d. nicotinamide e. adenine

2. Isolating the nucleic acid from the non-transforming form and the Rous sarcoma virus (RSV. will result in RNA species that are: a. Identical in genetic material and length b. Identical in genetic material except for an additional sequence in the non-transforming form. c. Identical in genetic material except for an additional sequence in RSV d. Identical in length but different in genetic material e. Differ in both genetic material and length

3.What is the normal role of tumor suppressors? a. to restrain cell growth and prevent cells from becoming malignant. b. to promote the loss of growth control and the conversion of a cell to a malignant state. c. to promote metastasis. d. to prevent a cell from becoming a victim of apoptosis. e. to assist G-protein coupled responses.

4.What is the delta G of the overall metabolism of glucose to CO2 and H2O? a. Negative b. Positive c. 0 d. Positive until Pyruvate is formed e. Negative until Pyruvate is formed

5. Many proteins are activated by proteolytic cleavage. Others by phosphorylation, others by binding a cofactor, and others by pH. Which of the following choices includes all of those that are activated by cleavage? i. insulin ii. caspase iii. adenylyl cyclase iv. Glycogen Phosphorylase A v. Phosphoinositol Phospholipase C vi. receptor tyrosine kinases vii. acid phosphatase a. vi, vii b. i, ii c. iii, iv d. ii, vi, iv e. iv, vi

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The function of tRNA is to

Select one:

a. provide a site for polypeptide synthesis

b. transport amino acids to the ribosome

c. transcribe DNA

d. transform DNA

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The lipid bi-layer is

Select one:

a. hydrophilic

b. hydrophobic

c. hydrophilic and hydrophobic

d. depends on the surrounding medium

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Which of the following statements is FALSE?

Select one:

a. carbohydrates are generally hydrophilic molecules.

b. living things use carbohydrates for structure and for energy storage.

c. carbohydrates are composed principally of carbon, hydrogen, and oxygen.

d. none of the above â they are all true

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Which of the following terms correctly describes a compound featuring more than one double bond?

Select one:

a. saturated

b. polyunsaturated

c. monounsaturated

d. disaturated

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Eukaryotic mRNA transcripts are protected from modification by

Select one:

a. 5' caps

b. 5' poly-A caps

c. 3' caps

d. 5'-3' poly tails

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The methods of membrane transport that don't require protein channels or carriers are

Select one:

a. osmosis

b. diffusion

c. phagocytosis

d. exocytosis

e. all of the above

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Complete the following sentences: "Primary active transport is dependent on __________. Secondary active transport is dependent on __________ created by __________.

Select one:

a. channel proteins, electrochemical gradient, carrier proteins

b. electrochemical gradient, ATP, mitochondria

c. electrochemical gradient, ATP, primary active transport

d. ATP, electrochemical gradient, primary active transport

e. carrier proteins, electrochemical gradient, channel protein

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Which of the following is a reduced compound?

Select one:

a. CO2

b. O2

c. N2

d. NAD +

e. NADH

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Gel electrophoresis separates DNA fragments according to their:

Select one:

a. base sequence

b. size

c. percentage of labelled nucleotides

d. electrical charge

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G0 is:

Select one:

a. part of interphase

b. the phase of the cell cycle where DNA replication occurs

c. the phase of the cell cycle where two identical daughter cells are created

d. a special "resting" phase in which cells are in a non cycling state

e. a special phase where the number of chromosomes in a parent cell is reduced by half such that each daughter cell contains only one member of a pair of homologous chromosomes

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At which pH will the concentration of hydrogen ions be equal to the concentration of hydroxide ions?

Select one:

a. pH 1

b. pH 5

c. pH 7

d. pH 9

e. pH 14

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Which of the following enzymes has proofreading activity?

Select one:

a. Ligase

b. Helicase

c. Topoisomerase

d. DNA polymerase

e. Peptidyl transferase

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The process of _______________ cuts introns from the primary transcript and the final "processed" mRNA is produced.

Select one:

a. RNA cleaving

b. RNA translocation

c. RNA elongation

d. RNA splicing

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Transcription is initiated when RNA polymerase binds to

Select one:

a. a promoter

b. an initiator

c. a transciptor

d. a codon

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Complete the following sentences: "__________ connect the extracellular matrix with microfilaments. __________ connect intermediate filaments from adjacent cells."

Select one:

a. Cadherins, Integrins

b. Connexins, Cadherins

c. Integrins, Cadherins

d. Integrins, Connexins

e. Connexins, Integrins

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Which of the following regions of RNAs are translated?

Select one:

a. 5' UTR

b. exons

c. introns

d. 3' UTR

e. poly-A

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Control of gene expression in eukaryotic cells occurs at which level(s)?

Select one:

a. only the transcriptional level

b. epigenetic and transcriptional levels

c. epigenetic, transcriptional, and translational levels

d. epigenetic, transcriptional, posttranscriptional, translational, and posttranslational levels

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Cellular organelles containing hydrolytic enzymes are called:

Select one:

a. peroxisomes

b. lysosomes

c. ribosomes

d. mesosomes

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______ are chemicals or combinations of chemicals that take up excess hydrogen ions or hydroxide ions in order to keep the pH constant.

Select one:

a. acids

b. bases

c. salts

d. buffers

e. carbohydrates

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Which of the following proteins appear in some stages of the cell cycle and are degraded at other stages?

Select one:

a. kinases

b. cyclins

c. nucleotides

d. phosphatases

e. none of the above

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Which of the following correctly matches an organelle with its function?

Select one:

a. mitochondrion photosynthesis

b. nucleus cellular respiration

c. ribosome manufacture of lipids

d. lysosome movement

e. central vacuole storage

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What is the sequence corresponding to the following electropherogram obtained by Sanger sequencing (green: A; red:T; black: G; blue: C)?

Select one:

a. CCGTTATGAAC

b. GGCTTATGAAG

c. CAACTATTGCC

d. GGCAATAGTTG

e. CCGTTATCAAC

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Which of the following statement is true

Select one:

a. the two DNA strands are parallel and complementary

b. the two DNA strands are anti parallel and non-complementary

c. the two DNA strands are anti-parallel and complementary

d. none of these

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The energy-requiring process by which small molecules are joined to form larger molecules is specifically called

Select one:

a. metabolism

b. anabolism

c. catabolism

d. enzymatic reactions

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When DNA replication starts

Select one:

a. the phosphodiester bonds between the adjacent nucleotides break

b. the bonds between the nitrogen base and deoxyribose sugar break

c. the leading strand produces Okazaki fragments

d. the hydrogen bonds between the nucleotides of two strand break

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A(n)_______ is the movement of a segment of a chromosome from one chromosome to another nonhomologous chromosome

Select one:

a. inversion

b. translocation

c. deletion

d. duplication

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Complete the following sentences: "Replication forks from the same origin of replication extend __________. __________ DNA strand is used as template for the leading strand at one fork and for the lagging strand at the second fork. New DNA is synthesized from 5' to 3' on the __________."

Select one:

a. unidirectionally, A different, both the leading and lagging strands

b. bidirectionally, The same, leading strand

c. bidirectionally, The same, lagging strand

d. unidirectionally, A different, leading strand

e. bidirectionally, The same, both the leading and lagging strands

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Manufacturing recombinant DNA molecules involves cutting a gene from its normal location, inserting it into a circular piece of DNA from a bacterial cell, and then transferring the circle of DNA to cells of another species. Which of the below describe the circular piece of DNA?

Select one:

a. restriction enzyme

b. plasmid

c. bacteriophage

d. transposon

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Complete the following chemical equation to make it balanced: glycerol + ___ ? triacylglycerol + ___

Select one:

a. 3 fatty acid, 3 H2O

b. fatty acid, H2O

c. 3 OH-, 3 H+

d. 3 H2O, 3 fatty acid

e. fatty acid, 3 H2O

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Which structure is found in plant cells but not animal cells? Check all that apply.

Select one or more:

a. Cell wall

b. Chloroplast

c. Plastid

d. Central vacuole

e. Lysosomes

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BIO SCI 93 Study Guide - Final Guide: Tumor Suppressor Gene, Isotopes Of Nitrogen, Tomato Juice

BIO SCI 93 Full Course Notes

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