91. Chromosome tips, or ____, function as a cellular clock that ticks down as pieces are lost from the very ends.
A. chromatids.
B. centromeres.
C. centrioles.
D. telomeres.
ANSWER: D
92. The use or alteration of cells or biochemicals to provide a useful product describes _______.
A. recombinant DNA technology.
B. transgenic technology.
C. biotechnology.
D. gene targeting.
ANSWER: C
93. Which gene transfer technique involves a tiny needle which is used to inject DNA into a cell lacking that DNA sequence?
A. Electroporation.
B. Liposome transfer.
C. Microinjection.
D. Particle bombardment.
ANSWER: C
94. The process of ____ involves the introduction of a gene into a cell where it exchanges places with its counterpart in the host cell.
A. transgenic technology.
B. gene targeting.
C. knockout technology.
D. recombinant DNA technology.
ANSWER: B
95. Which gene transfer technique involves the use of a fatty bubble to carry a gene into a somatic cell?
A. Electroporation.
B. Liposome transfer.
C. Microinjection.
D. Particle bombardment.
ANSWER: B
96. _____ house are required to grow regenerated plants for further propagation.
A. Green.
B. Blue.
C. Red.
D. White.
ANSWER: A
97. RAPD is a molecular marker based on _____ amplification.
A. RFLP.
B. PCR.
C. AFLP.
D. SSR.
ANSWER: B
98. _______ marker is a DNA sequence in the genome which can be located and identified.
A. Molecular.
B. Genetic.
C. Biochemical.
D. Physical.
ANSWER: A
99. Which type of compound is the glycine betaine?
A. Aluminium.
B. Calcium.
C. Phosphorous.
D. Ammonium.
ANSWER: D
100. Which one of the following is the broad spectrum herbicide?
A. Glyphosate.
B. Sulfonyl urea.
C. Phosphinothricin.
D. Imidazoliinones.
ANSWER: C
