🧱Which algal group is most closely related to land plants?
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Rhodophyta
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Chlorophyta
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Phaeophyta
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Bacillariophyta.
🧱Which group of algae has cell walls made of silica?
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Chlorophyta
0%
Phaeophyta
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Bacillariophyta
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Rhodophyta
🧱Which of the following is true about phycobilins?
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They are found in green algae
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They are water-insoluble pigments
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They are accessory pigments in red and cyanobacteria
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They absorb green light
🧱The storage form of carbohydrate in red algae (Rhodophyta) is:
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Starch
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Laminarin
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Floridean starch
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Glycogen
🧱A short molecule containing 2-20 nucleotide is
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plasmid
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vector
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oligonucleotide
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mononucleotide
🧱 Enzymes that recognize and cleave specific 4 to 8 base pair sequences of DNA are
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DNA ligase
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helicases
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restriction endonucleases
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DNA gyrase
🧱Which of the following vector can maintain the largest fragment of foreign DNA?
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YAC
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Cosmid
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Plasmid
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Phage
🧱For gene probes to be useful they must
be large enough to contain
be large enough to contain
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gene-specific sequences
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be labeled in some manner to allow detection
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both (a) and (b)
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none of the above
🧱Charged molecules are separated based on varying rates of migration through a solid matrix when subjected to an electric field. This technique is known as
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photoreactivation
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gel electrophoresis
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autoradiography
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blotting
🐞A plasmid can be considered as a suitable cloning vector if
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it can be readily isolated from the cells
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it possesses a single restriction site for one or more restriction enzymes
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insertion of foreign DNA does not alter its replication properties
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All of the above
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🐞Difference between λ gt 10 and λ gt 11 vectors is that
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λ gt 11 is an expression vector
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λ gt 10 is an expression vector
50%
λ gt 10 is a replacement vector
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λ gt 11 is a replacement vector
🐞Select the wrong statement about plasmids?
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It is extrachromosomal
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It is double stranded
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Its replication depends upon host cell
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It is closed and circular DNA
🐞Conjugative plasmids
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exhibit antibiotic resistance
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do not exhibit antibiotic resistance
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carry transfer genes called the tra genes
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do not carry transfer genes