Question

which of the following function of dna did you learn about? (select all)
a. conducting electrical impulses
b. encoding proteins
c. synthesizing enzymes
d. storing and transmitting genetic information
what components make up a nucleotide in dna?
a. phosphate group, lipid molecule, and nitrogenous base
b. sugar molecule, phosphate group, and nitrogenous base
c. sugar molecule, phosphate group, and oxygen atom
d. sugar molecule, nitrogenous base, and lipid group
what is the significance of mitochondrial dna?
a. it is inherited solely from the mother
b. it is found only in plants
c. it is responsible for protein synthesis
d. it is inherited from both parents
which technology is used for amplifying specific dna sequences?
a. crispr - cas9
b. polymerase chain reaction (pcr)
c. gel electrophoresis
d. dna sequencing
what pairs with guanine in dna?
a. adenine
b. thymine
c. uracil
d. cytosine
what are the basic structural units of dna called?
a. proteins
b. nucleotides
c. amino acids
d. carbohydrates
what is the complementary strand for the dna sequence atc - gta?
a. agc - att
b. tta - gca
c. atg - cat

Explanation:

1. DNA encodes proteins, synthesizes enzymes (through protein - enzyme connection), and stores and transmits genetic information. It does not conduct electrical impulses.
2. A nucleotide in DNA is made up of a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base.
3. Mitochondrial DNA is inherited solely from the mother.
4. Polymerase Chain Reaction (PCR) is used for amplifying specific DNA sequences. CRISPR - Cas9 is for gene editing, gel electrophoresis for separating DNA fragments, and DNA sequencing for determining the DNA sequence.
5. In DNA, guanine pairs with cytosine. Adenine pairs with thymine, uracil is in RNA.
6. The basic structural units of DNA are nucleotides. Proteins are made from amino - acids, and carbohydrates are a different class of biological molecules.
7. For the DNA sequence ATC - GTA, following base - pairing rules (A - T, C - G), the complementary strand is TAG - CAT.

Answer:

1. B. Encoding proteins, C. Synthesizing enzymes, d. Storing and transmitting genetic information
2. b. Sugar molecule, phosphate group, and nitrogenous base
3. a. It is inherited solely from the mother
4. b. Polymerase Chain Reaction (PCR)
5. d. Cytosine
6. b. Nucleotides
7. None of the provided options are correct. The correct complementary strand is TAG - CAT.