|
1.1 The study of life Read Online
Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.
Chapter 14: DNA Structure and Function MCQ Multiple Choices Questions Quiz Test Bank
14.1 Historical Basis of Modern Understanding
14.2 DNA Structure and Sequencing
14.3 Basics of DNA Replication
14.4 DNA Replication in Prokaryotes
14.5 DNA Replication in Eukaryotes
14.6 DNA Repair
Download MCQ Quiz PDF eBook
Question: Meselson and Stahl's experiments proved that DNA replicates by which mode?
Choices:
conservative
semi-conservative
dispersive
none of the above
Question: In eukaryotes, what is the DNA wrapped around?
Choices:
single-stranded binding proteins
sliding clamp
polymerase
histones
Question: Which of the following does the enzyme primase synthesize?
Choices:
DNA primer
RNA primer
Okazaki fragments
phosphodiester linkage
Question: The ends of the linear chromosomes are maintained by
Choices:
helicase
primase
DNA pol
telomerase
Question: Which of the following components is not involved during the formation of the replication fork?
Choices:
single-strand binding proteins
helicase
origin of replication
ligase
Question: If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C?
Choices:
27 percent
30 percent
23 percent
54 percent
Question: If the sequence of the 5'-3' strand is AATGCTAC, then the complementary sequence has the following sequence:
Choices:
3'-AATGCTAC-5'
3'-CATCGTAA-5'
3'-TTACGATG-5'
3'-GTAGCATT-5'
Question: DNA double helix does not have which of the following?
Choices:
antiparallel configuration
complementary base pairing
major and minor grooves
uracil
Question: During proofreading, which of the following enzymes reads the DNA?
Choices:
primase
topoisomerase
DNA pol
helicase
Question: In which direction does DNA replication take place?
Choices:
5'-3'
3'-5'
5'
3'
Question: The experiments by Hershey and Chase helped confirm that DNA was the hereditary material on the basis of the finding that:
Choices:
radioactive phage were found in the pellet
radioactive cells were found in the supernatant
radioactive sulfur was found inside the cell
radioactive phosphorus was found in the cell
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|