Question

Which of the amino acid residues has the smallest R group? *
a. Alanine
b. Valine
c. Leucine
d. Isoleucine
e. glycine

A cell has cytoplasm, ribosomes, and plasma membrane. Based on this information, it could be a/an ____. *
a. fungal cell
b. insect cell
c. bacterial cell
d. algal cell
e. All of the given choices

A lytic cycle concludes with the ___. *
a. production of a bacteriophage
b. bursting of the host cell
c. division by mitosis
d. embedding of viral DNA into the host cell’s DNA
e. production of messenger RNA

Most solids will sink if placed in a liquid, however, ice reacts differently by floating in liquid water. Which of the following best explains this occurrence? *
a. Ice always has air bubbles that keep it afloat.
b. The ionic bonds between the molecules in ice prevent the ice from sinking.
c. The covalent bonds, between the water atoms, break expanding the ice molecules.
d. Hydrogen bonds stabilize forming a crystal lattice of water molecules.*

Alanine has pKa values of 2.4 and 9.9. Its isoelectric point, pI, is equal to____. *
a. 4.13
b. 23.76
c. 6.15
d. 7.50

Statement 1: In a biochemical reaction, energy is take n up and released in a gentle way, not violently as those occurring in vitro. Statement 2: This is because of the low specific heat of water which makes up a large proportion of the protoplasm. *
a. Both the given statements are false.
b. Both the given statements are true.
c. Only the second given statement is true.
d. Only the first given statement is true.

The non-superimposable mirror image of an amino acid results from the fact that its alpha carbon ___. *
a. is symmetric
b. is a carboxylic acid
c. has no net charge
d. is bonded to four different chemical groups
e. is amphoteric

Statement 1: Biochemistry as a basic science in the field of agriculture studies the chemical compositions and reactions involved in the production, protection, and use of crops and livestock. Statement 2: Its applied science and technology aspects are directed toward control of those processes to increase yields, improve quality, and reduce costs. *
a. Only the first given statement is true.
b. Both the given statements are true.
c. Both the given statements are false.
d. Only the second given statement is true.

The lone pair electrons on oxygen in a H2O molecule ___. *
a. carry a partial negative charge
b. carry a partial positive charge
c. are not important for the properties of water
d. make water a nonpolar solvent

In animal cells, hydrolytic enzymes are packaged to prevent general destruction of cellular components. Which of the following organelles functions in this compartmentalization? *
a. Lysosome
b. Plasmodesma
c. Peroxisome
d. Ribosome
e. Glyoxysome

Which set of the following amino acids have polar and neutral side chain? *
W K Q
M T C
H M N
T N Y

The side chain for histidine is classified as a ________ R group. *
neutral
acidic
nonpolar
basic
polar

If a solution is buffered at a pH of 6.0, then the addition of a small amount of acid will cause the solution to have a pH of approximately ___. *
7.0.
5.0.
4.0.
6.0.

Answer 1

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