Contoh Soal Menghadapi Quiz Uji Nyali Ujian 1

The explanation for the given answer is that the statement and the reason both state that the important feature of DNA molecules is their nucleotide sequence. The reason supports the statement by explaining that if the sequence of a DNA molecule is known, the genes contained within it can be identified and their activities can be studied in detail. This cause-and-effect relationship between knowing the nucleotide sequence and being able to identify and study genes supports the conclusion that both the statement and reason are correct and are related to each other.

The correct answer states that if statements 1, 2, and 3 are true, then the given statement is true. This means that for DNA synthesis to occur in the 5′→3′ direction, new nucleotides must be added to the 3′ carbon on the existing polynucleotide chain, and a molecule is released in the process.

The helical structure of DNA is stabilized by hydrogen bonding between the base pairs, specifically adenine with thymine and guanine with cytosine. This base pairing allows for the complementary and accurate replication of DNA during cell division. The antiparallel arrangement of the two DNA strands allows for efficient base pairing and ensures the stability of the helix. Additionally, the hydrophobic interactions between the stacked bases contribute to the overall stability of the DNA helix. However, the stability of the DNA helix is not primarily dependent on the phosphodiester and glycosidic bonds that connect the individual nucleotides within each DNA strand.

The correct answer is 1 and 3 are correct. This is because rRNA (ribosomal RNA) is a non-coding RNA found in both prokaryotes and eukaryotes, and tRNA (transfer RNA) is also a non-coding RNA found in both types of organisms. mRNA (messenger RNA) is not a non-coding RNA, as it carries the genetic information from DNA to the ribosomes for protein synthesis. snRNA (small nuclear RNA) is a non-coding RNA, but it is only found in eukaryotes, not prokaryotes. Therefore, options 2 and 4 are incorrect.

The correct answer is 1 and 3 are correct. This is because transcriptome analysis during the sporulation stage of Saccharomyces cerevisiae can be used to identify the interaction between the genome and environmental signals (option 1) as well as to determine the function of genes that have not been characterized yet (option 3).

Jika 1, 2, dan 3 benar, maka ikatan yang menghubungkan antar nukleotida dalam polinukleotida adalah ikatan fosfodiester. Ikatan fosfodiester terbentuk antara gugus fosfat pada nukleotida dengan gugus hidroksil pada nukleotida lainnya, membentuk rantai polinukleotida.

The correct answer is "Pemrosesan RNA (Processing of RNA)". Processing of RNA refers to the series of modifications and editing that occur to the primary transcript of RNA before it becomes a mature and functional RNA molecule. This includes processes such as splicing, where introns are removed and exons are joined together, as well as modifications like capping and polyadenylation. These processing steps are essential for the proper functioning and stability of RNA molecules.

Pasangan basa purin-purin terlalu besar untuk membentuk ikatan hidrogen, karena memiliki struktur yang kompleks dan banyak gugus fungsional. Di sisi lain, pasangan basa pirimidin-pirimidin terlalu kecil untuk membentuk ikatan hidrogen, karena memiliki sedikit gugus fungsional yang dapat berinteraksi dengan basa lainnya. Oleh karena itu, pasangan basa yang paling mungkin membentuk ikatan hidrogen adalah basa purin-pirimidin.

Triptofan is one of the amino acids that is encoded by a single codon. This means that the genetic code only requires one specific sequence of three nucleotides to produce the amino acid triptofan. This is in contrast to other amino acids that may have multiple codons that can code for them. Therefore, triptofan stands out as an amino acid that has a unique and specific codon for its synthesis.

The correct answer is that DNA is labeled with phosphorus isotopes and protein is labeled with sulfur isotopes. This is because Hershey and Chase's experiment involved labeling the DNA and protein of the bacteriophage T2 with different isotopes. By using radioactive isotopes, they were able to track the movement of these molecules and determine that DNA, not protein, is the genetic material that is passed on during viral infection.

The correct answer is 2 and 4 are correct. This is because in the formation of β‐N‐glycosidic bond, carbon-1 of the sugar molecule forms a bond with nitrogen-1 of adenine (base) and carbon-1 of the sugar molecule also forms a bond with nitrogen-9 of guanine (base).

The statement is true because the genetic organization of yeast is indeed more economical compared to the human genome. This is because the yeast genome has a lower gene density compared to the human genome. However, the reason provided in the second statement is incorrect, as it states the opposite. Therefore, the statement is true, but the reason is false.

The correct answer is "Kode genetik dan tRNA." The code genetic refers to the sequence of nucleotides in DNA or RNA that determines the sequence of amino acids in a protein. tRNA, or transfer RNA, is a type of RNA molecule that carries the correct amino acid to the ribosome during protein synthesis, based on the codon sequence on the mRNA. Therefore, the code genetic and tRNA are both crucial components in connecting the transcriptome (mRNA) with the proteome (protein expression) in the genome.

The statement is correct because "tandemly repeated DNA" refers to DNA fragments that contain repeated sequences, which can form satellite bands when genomic DNA is fragmented using agarose gel electrophoresis. However, the reason is incorrect because it does not provide a cause-and-effect relationship between the two statements.

The correct answer is "Pernyataan dan alasan benar, keduanya tidak ada hubungan sebab akibat." This means that the statement and the reason are both correct, but they do not have a cause-effect relationship. The statement is true because the genetic code is not universal, meaning that different organisms may have different codons for the same amino acid. The reason is also true because some amino acids are coded by more than one codon. However, the reason does not explain why the genetic code is not universal, so there is no cause-effect relationship between the statement and the reason.

The statement that is NOT TRUE about eukaryotic genomes is "Genom lalat buah lebih banyak mengandung intron dibanding genom manusia" (The genome of fruit flies contains more introns than the human genome). This statement is incorrect because the human genome contains a larger number of introns compared to the fruit fly genome.

The correct answer is Oswald Avery and Alfred Hershey-Martha Chase. This conclusion is based on two experiments conducted by the molecular biologists. The experiments conducted by Oswald Avery and Alfred Hershey-Martha Chase provided evidence that DNA carries genetic information and is responsible for the production of genes. This discovery was a significant breakthrough in the field of molecular biology and laid the foundation for further research on genetics.

The correct answer is 4, Proteom. The proteome refers to all the proteins expressed by a cell, tissue, or organism. It is the central link between the expression of the genome and the biochemical activities of the cell. Proteins are the functional molecules in cells and carry out various biochemical processes, so understanding the proteome is crucial in understanding cellular function and activity.

The correct answer is 1, 2, and 3 are correct because prokaryotic and eukaryotic genomes differ in terms of their gene size, presence of introns, and types of repetitive sequences. Additionally, 2 and 4 are also correct because eukaryotic genomes have introns and are composed of monomers.