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HTTP Multiple Choice Questions

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1. The enterprise model represents
�� transactions for an enterprise.
�� the current state of the enterprise.
�� all enterprise processes.
�� the interaction between client and server.

2. The HyperText Transfer Protocol is
�� a data link protocol.
�� a stateless protocol.
�� based on TCP port number 60.
�� all of the above.

3. If we could examine the bits transmitted over a network that are sent using a TCP/IP socket, we
would find
�� the data link protocol.
�� the internet protocol.
�� the transmission control protocol.
�� all of the above.
�� none of the above.

4. A network consisting of multiple computers connected to a switch would have a
�� star toplogy.
�� ring topology.
�� bus topology.
�� mesh topology.
�� none of the above.

5. The Internet Protocol
�� provides handshaking to provide error control.
�� connects to a port corresponding to a program.
�� uses network hardware addresses in the packet.
�� all of the above.
�� none of the above.

6. The carrier sense multiple access with collision detection protocol used for Ethernet
�� will retransmit a frame if a collision is detected during transmission.
�� has no limit to the number of retransmissions.
�� requires nodes to notify each other if they want to transmit.
�� all of the above.
�� none of the above.

7. The TCP protocol uses the acknowledgement number to
�� encrypt the data.
�� track the number of bytes transmitted.
�� control the window size.
�� none of the above.

8. The TCP port number used in the TCP protocol corresponds to
�� internet addresses.
�� hardware addresses.
�� protocols used by programs to transmit data.
�� physical connections.

9. The structure of the internet address is defined by the
�� first byte of the address.
�� second byte of the address.
�� data link layer.
�� network connection.

10. For each client connecting to a server using sockets,
�� the server must accept a connection before the client can communicate.
�� the client can only try to establish a connection once.
�� clients can request data but cannot write to the server.
�� none of the above.

11. In JAVA, for a class called Animals, a subclass called Birds would be defined by

a. public class Birds subclass of Animals{
float wingSpan;// wing span in meters
public float get_wingSpan() {
return(wingSPan);
}
}

b. public class Birds extends Animals{
float wingSpan;// wing span in meters
public float get_wingSpan() {
return(wingSPan);
}
}

c. public class Birds extension of Animals{
float wingSpan;// wing span in meters
public float get_wingSpan() {
return(wingSPan);
}
}
d. none of the above.

12. A thread in a JAVA program
�� allows only one connection to a TCP/IP port.
�� can be used to make multiple functions to run independent of each other.
�� is used to define the type of ADO connection for a server.
�� prevent multiple IP address conflict.

13.. The Data Definition Language is used to
�� specify the structure of a database.
�� define the data types in a database.
�� modify the current database structure.
�� none of the above
�� all of the above

14. In a relational database,
�� each row must be unique.
�� a table must appear in sorted order.
�� only one foreign key is allowed.
�� all of the above

15.

16. When a method in JAVA throws an exception,
�� the program must stop.
�� the method must be enclosed in a try structure.
�� the method must be in a thread.
�� the method must be in the main class.

17. The Ethernet frames for two nodes have collided twice on the network for each node. The next
possible number of slot times delayed at each node could be,
�� 0.
�� 1.
�� 2.
�� 3.
�� all of the above

18. The CRC portion of the Ethernet frame is used to
�� provide error checking.
�� store the hardware address.
�� encrypt data.
�� sequence frames.
�� none of the above

19. By writing messages to a ServerSocket in JAVA,
�� a server can communicate with a client.
�� respond to client requests for a connection.
�� drop clients.
�� none of the above

20. When a router selects a physical connection to send a packet to a destination it uses,
�� the hardware address of the destination.
�� the IP address of the destination.
�� the tender address of the destination.
�� the CRC number of the destination.

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Amino acids multiple choice questions

Which statement is incorrect about the classification of amino acids?
a. Alanine and valine are neutral, nonpolar amino acids.
b. Lysine and arginine are basic amino acids.
c. Tryptophan and phenylalanine are aromatic amino acids.
d. Aspartic acid and aspargine are acidic amino acids.

Which of the following amino acids is the least water soluble at pH 7.0?
a. Tryptophan
b. Glutamic acid
c. Cysteine
d. Histidine

Which amino acid would migrate the furthest toward the anode (positive electrode) during paper electrophoresis at pH 7.0?
a. Aspartic acid
b. Alanine
c. Lysin
d. Glutamine

Which of the following functional groups, attached to an inert matrix, could function as a cation exchanger?
a. Diethylaminoethyl-
b. p-aminobenzyl-
c. Carboxymethyl-
d. Trimethylammonium-

Which of the following amino acids would make the best buffer at pH 4.5?
a. Histidine
b. Alanine
c. Glutamine
d. Aspartic acid

Which fact is incorrect about stereoisomers?
a. A diastereomer is a nonsuperimposable non-mirror image.
b. An enantiomer is a nonsuperimposible mirror image.
c. Diastereomers have different melting points.
d. Diastereomers rotate plane polarized light in equal but opposite direction.

Which statement is incorrect about L-isoleucine?
a. Its enantiomer is named O-isoleucine.
b. It contains a total of two asymmetric or chiral carbons.
c. It can also be named as (28, 38)-isoleucine using the (R,8) system.
d. Its diastereomer would be named O-alloisoleucine.

An isoelectric amino acid was dissolved in water and the resulting pH was approximately 7.6. What amino acid would possess this property?
a. Alanine
b. Glutamic acid
c. Histidine
d. Lysine

What volume of NaOH is required to adjust the solution of monosodium aspartate to pH 9.8?
a. 1 ml
b. 2 ml
c. 3 ml
d. 6 ml or more

What volume of 2 N Hel is required to completely titrate the 4 mmol of monosodium aspartate?
a. 2 ml
b. 3ml
c. Aml
d. 6 ml or more

Which statement is correct about the peptide ala-ser?
a. Alanine is at the N-terminal of the peptide.
b. There are a total six atoms that lie in the plane of the peptide bond linking alanine to serine.
c. The alpha-carbon of alanine is sp3 hybridized d All the above are correct statements.

What is the product formed from the acid hydrolysis of a simple amide?
a. Acid & base
b. Aldehyde & alcohol
c. Acid & amine
d. Ester & alcohol

The complete acid hydrolysis of the peptide ala-gln-trp-ser would yield:
a. Ala, gin, trp, ser
b. Ala, glu, ser
c. Ala, glu, trp, ser
d. Ala. ser

Fibrous proteins, such as collagen, have which of the following properties?
a. Highly soluble in water
b. Their hydrophilic residues are directed into the interior of the protein
c. Exhibit enzymatic activity
d. Serve structural roles in the cell

Quaternary structure is associated with:
a. The overall shape of a polypeptide chain
b. The sum of the secondary and tertiary interactions
c. Simple proteins with only one subunit
d. The relative orientation of one polypeptide to another polypeptide in a multi-subunit protein.

The information needed to define the structure of a protein is essentially contained in:
a. Amino acid composition
b. Amino acid sequence
c. Secondary structure
d. Tertiary structure.

Insulin is a polypeptide hormone that contains two short polypeptide chains linked by two interstrand disulfide bonds. The most logical order of events to perform in order to sequence this protein would be:
A: The peptides are reduced with mercaptoethanol.
B: The peptides are sequenced using Edman chemistry .
C: The peptides are separated by chromatography techniques. 0: The peptides are alkylated with iodoacetamide.
a. A, D,C, B b.C,A, 0, B
c. C, B, A, 0
d. A, B, C, 0

Which statement is incorrect about the peptide val-asp-trp-asn-ser?
a. This peptide would show a strong absorption band at 280 nm.
b. Reaction with chymotrypsin would yield two peptides.
c. To synthesize this peptide using the solid phase method of Merrifield, the amino acid directly attached to the resin would be serine.
d. After the second round of Edman chemistry using the reagent PITC, the PTH -amino acid residue released would be PTH-asn.

Which statement is incorrect about the reaction of the peptide ser-Iys-asp-trp-cys-metasn-phe-ala with the following reagents?
a. Reaction with cyanogens bromide would yield two peptides.
b. Reaction with trypsin would result in three peptides. The smallest of three peptides would have the highest pi of the three.
c. Reaciton with chymotrypsin would result in the peptides ser-Iys-asp & try-cys-met-Iysasn-phe-ala .
d. Reaction with chymotrypsin would yield a different set of peptides that overlap those obtained with tryspsin

Determine the amino acid sequence of the following oligopeptide from the experimental data below:
The amino acid composition is found the be ala, Iys, phe, met, cys plus some
decompsition products.
2. The peptide has a molecular weight around 700 Da and absorbs at 280 nm.
3. Treatment with carboxypeptidase results in tryptophan and a peptide.
4. CNBr treatment yields a tetrapeptide and a dipeptide.
5. Trypsine digestion produces an amino acid and a pentapeptide with met on the amino end.
6. Chymotrypsin digestion yields a dipeptide and a tetrapeptide.
a. trp-Iys-met-cys-met-ala
b. Iys-met-cys-phe-ala-trp
c. trp-ala-phe-cys-met-Iys
d. Iys-ala-cys-phe-met -trp

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