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- Question
Which of the following statements about DNA replication is true?
Options- A. Single?strand binding proteins stabilize the open conformation of the unwound DNA.
- B. Okazaki fragments are DNA fragments synthesized on the leading strand.
- C. DNA polymerase adds dNTP monomers in the 3?-5? direction.
- D. DNA gyrase unwinds the DNA double helix.
- Correct Answer
- Single?strand binding proteins stabilize the open conformation of the unwound DNA.
- 1. Which best describes a gene?
Options- A. a segment of chromosomal DNA
- B. tightly coiled strands of DNA
- C. different allele forms of a trait
- D. None of the above Discuss
- 2. During the process of protein synthesis, each trna carries one
Options- A. amino acid
- B. nucleotide
- C. fatty acid
- D. nucleic acis Discuss
- 3. Which chemical is not found in DNA nucleotides?
Options- A. Thymine
- B. Uracil
- C. Adenine
- D. All of the above Discuss
- 4. Which of the following defines a genome?
Options- A. Every human cell
- B. the complete set of an organism's genes and other DNA sequences
- C. the complete set of an organism's polypeptides
- D. a karyotype Discuss
- 5. In recombinant DNA methods, the term vector can refer to
Options- A. the sticky end of a DNA fragment
- B. a plasmid used to transfer DNA into a living cell
- C. a DNA probe used to identify a particular gene
- D. the enzyme that cuts DNA into restriction fragments Discuss
- 6. Tubes that bifurcate from the windpipe
Options- A. Bronchi
- B. pleura
- C. Apex
- D. Adenoids Discuss
- 7. Which describes how mRNA is used by a cell?
Options- A. It is used to move information to other cells.
- B. It is used to check DNA for mutations.
- C. It is used to replicate DNA for mitosis.
- D. It is used to transfer genetic information. Discuss
- 8. Where does most digestion take place?
Options- A. Stomach
- B. Large intestine
- C. Small intestine
- D. Mouth Discuss
- 9. Enzymes are important because they
Options- A. maintain cell shape
- B. transfer genetic information
- C. contain water
- D. speeds up chemical reactions Discuss
- 10. Which best describes the structure of a DNA molecule?
Options- A. A double helix
- B. A strand of nucleic acids
- C. A single strand of amino acids
- D. A sugar ring Discuss
Biology problems
Search Results
Correct Answer: a segment of chromosomal DNA
Explanation:
Gene is a hereditary unit consisting of a sequence of DNA that occupies a specific location on a chromosome and determines a particular characteristic in an organism.
In short it is a piece or segment of chromosome.
Genes undergo mutation when their DNA sequence changes.
Correct Answer: amino acid
Explanation:
During protein synthesis process, each tRNA carries one aminoacid for protein synthesis to the ribosomes.
Correct Answer: Uracil
Explanation:
A nucleotide is an organic molecule that is the building block of DNA and RNA. They also have functions related to cell signaling, metabolism, and enzyme reactions. A nucleotide is made up of three parts: a phosphate group, a 5-carbon sugar, and a nitrogenous base. The four nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. RNA contains uracil, instead of thymine.
A nucleotide within a chain makes up the genetic material of all known living things.
Correct Answer: the complete set of an organism's genes and other DNA sequences
Correct Answer: a plasmid used to transfer DNA into a living cell
Explanation:
The term 'Vector' in recombinant DNA methods, refers to a plasmid or other agent used to transfer DNA into a living cell.
Correct Answer: Bronchi
Explanation:
Tubes that bifurcate from the windpipe are called Bronchi.
Correct Answer: It is used to transfer genetic information.
Explanation:
A RNA copy of a DNA gene is called as messenger RNA or mRNA. mRna is used in translation because information is translated from one language (nucleotides) into another (amino acids).
Hence, mRNA is used to transfer genetic information by a cell.
Correct Answer: Small intestine
Explanation:
The digestion process starts in the mouth and the complete digestion process completes in the small intestine where all the nutrients in the food are absorbed.
Correct Answer: speeds up chemical reactions
Explanation:
Enzymes in the body are those which play an important role of breaking down the larger molecules to small and speeds up the chemical reactions.
Correct Answer: A double helix
Explanation:
DNA is not a single stranded and does not have amino acids. Hence options, b & C are eiminated. Dna is a double helix structure containing nucleobase?either cytosine (C), guanine (G), adenine (A), or thymine (T)?as well as a monosaccharide sugar called deoxyribose and a phosphate group.
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