Remedi Bio Xii Uh-3a

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    Kromosom kelamin

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Remedi Bio Xii Uh-3a - Quiz
About This Quiz

Untuk remedi ulangan harian 3A kelas XII-IPA

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  • 2. 

    Bagian terujung kromosom yang berfungsi untuk menjaga agar DNA di daerah tersebut tidak terurai

    Explanation
    The given answer, telomer, is correct because telomers are the protective caps at the end of chromosomes that prevent the DNA in that region from unraveling or being degraded. They consist of repetitive DNA sequences and specialized proteins that play a crucial role in maintaining the stability and integrity of the chromosome. By protecting the DNA and preventing it from being damaged or lost during replication, telomers ensure the accurate transmission of genetic information during cell division.

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  • 3. 
    Perhatikan gambar berikut! Tokoh di atas adalah pencetus model struktur DNA yang bernama ... . - ProProfs

    Perhatikan gambar berikut! Tokoh di atas adalah pencetus model struktur DNA yang bernama ... .

    • Krebs

    • Watson

    • Aristoteles

    • Mendel

    • Charles Darwin

    Correct Answer
    A. Watson
    Explanation
    The figure shown in the question is of James Watson, who is one of the scientists credited with discovering the structure of DNA along with Francis Crick. Watson and Crick proposed the double helix structure of DNA in 1953, which revolutionized the field of genetics and molecular biology. Their discovery laid the foundation for understanding how genetic information is stored and passed on in living organisms.

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  • 4. 

    Metionin; kodon start

    Correct Answer
    AUG
    Explanation
    The given answer, AUG, is the codon that serves as the start signal for protein synthesis in most organisms. It codes for the amino acid methionine and is recognized by the ribosome as the beginning of the mRNA sequence. This codon is essential for initiating the translation process and ensuring the correct reading frame for protein synthesis.

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  • 5. 

    Persenyawaan kimia basa nitrogen dan deoksiribosa

    Correct Answer
    nukleosida
    Explanation
    The given question is incomplete and not readable. It is not clear what is being asked or what information is being provided. Therefore, an explanation cannot be generated.

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  • 6. 

    Enzim yang berfungsi untuk menggabungkan deoksiribo nukleosida trifosfat saat replikasi DNA adalah ... .   

    • Ligase

    • Primase

    • Protease

    • Helikase

    • Polimerase

    Correct Answer
    A. Polimerase
    Explanation
    Polimerase adalah enzim yang berfungsi untuk menggabungkan deoksiribo nukleosida trifosfat saat replikasi DNA. Enzim ini bertanggung jawab untuk mensintesis rantai baru DNA dengan memadukan nukleotida yang sesuai dengan untai asli DNA. Dalam proses replikasi DNA, polimerase membaca untai asli DNA dan menambahkan nukleotida yang sesuai untuk membentuk untai baru yang komplementer. Dengan demikian, polimerase adalah enzim yang penting dalam replikasi DNA.

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  • 7. 

    Replikasi ... menunjukkan bahwa double helix DNA terputus-putus kemudian segmen-segmen tersebut akan membentuk segmen baru yang akan bergabung dengan segmen lama dan membentuk DNA yang baru.

    Correct Answer
    dispersif
    Explanation
    The given statement describes the process of DNA replication, where the double helix structure of DNA is broken and the segments form new segments that join with the old segments to form new DNA. This process is known as "dispersive" replication, where the original DNA molecule is dispersed and mixed with the newly synthesized DNA segments.

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  • 8. 

    Enzim penghidrolisis rantai ganda polinukleotida menjadi rantai tunggal

    Correct Answer
    helikase
    Explanation
    Helicase is an enzyme that plays a crucial role in DNA replication and repair. It is responsible for unwinding the double-stranded DNA molecule by breaking the hydrogen bonds between the base pairs. This process allows the DNA strands to separate and form two single strands, which can then be used as templates for the synthesis of new DNA strands. Therefore, helicase is involved in the hydrolysis of the double-stranded polynucleotide chain into single strands.

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  • 9. 

    Golongan pirimidin pada RNA

    Correct Answer
    urasil
    Explanation
    The explanation for the given answer is that uracil is a pyrimidine base found in RNA. Pyrimidines are one of the two types of nitrogenous bases, along with purines, that make up the building blocks of nucleic acids. In RNA, uracil replaces thymine, which is found in DNA. Uracil pairs with adenine through hydrogen bonding, forming a base pair that helps in the formation of the RNA molecule during transcription. Therefore, uracil is the correct answer as it is a pyrimidine base specifically found in RNA.

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  • 10. 
    Perhatikan gambar kariogram manusia berikut! Berdasarkan kariogram yang tersusun acak tersebut, kariotipe-nya adalah ... .    - ProProfs

    Perhatikan gambar kariogram manusia berikut! Berdasarkan kariogram yang tersusun acak tersebut, kariotipe-nya adalah ... .   

    • 23 pasang autosom + XX

    • 22 pasang autosom + XX

    • 22 pasang autosom + XY

    • 24 pasang gonosom + XY

    • 23 pasang autosom + XY

    Correct Answer
    A. 22 pasang autosom + XY
    Explanation
    Based on the given karyogram, there are 22 pairs of autosomes and one pair of sex chromosomes, which is XY. This indicates that the individual is a male.

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  • 11. 

    Proses penerjemahan kode yang dibawa mRNA oleh tRNA disebut proses … .

    • Inisiasi

    • Elongasi

    • Translasi

    • Terminasi

    • Transkripsi

    Correct Answer
    A. Translasi
    Explanation
    The correct answer is "translasi". Translasi adalah proses penerjemahan kode yang dibawa oleh mRNA menjadi susunan asam amino dalam protein oleh tRNA. Pada proses ini, ribosom berperan dalam menghubungkan asam amino yang dibawa oleh tRNA berdasarkan urutan kodon pada mRNA. Proses translasi terjadi setelah proses transkripsi, di mana DNA diubah menjadi mRNA.

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  • 12. 

    Tabel kodon dan asam aminonya sebagai berikut. Kodon CAU   GCC     GGA        CCA    GUG Asam amino Serin  alanin  glutamin  prolin  valin Apabila urutan basa nitrogen DNA pada rantai sense adalah CAC CCT CGG GGT GTA maka urutan asam amino yang akan dibentuk adalah … .

    • Valin – glutamin – alanin – prolin – serin

    • Glutamin – alanin – valin – serin – prolin

    • Valin – glutamin – alanin – serin – prolin

    • Serin – valin – glutamin – alanin – prolin

    • Valin – alanin – valin – serin – prolin

    Correct Answer
    A. Valin – glutamin – alanin – prolin – serin
    Explanation
    The given DNA sequence CAC CCT CGG GGT GTA corresponds to the codons GUG GGA GCC CCA GUA. These codons translate to the amino acids Valin, Glutamin, Alanin, Prolin, and Serin, respectively. Therefore, the correct answer is Valin - Glutamin - Alanin - Prolin - Serin.

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  • 13. 

    Sentromer terletak agak ke ujung lengan kromosom

    Correct Answer
    akrosentris
    Explanation
    The given correct answer, "akrosentris," is an explanation for the statement "Sentromer terletak agak ke ujung lengan kromosom." This suggests that the centromere is located towards the end of the chromosome arm.

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  • 14. 

    Penerjemah kodon

    Correct Answer
    trna
    Explanation
    The given correct answer is "trna". tRNA (transfer RNA) is a type of RNA molecule that plays a crucial role in protein synthesis. It carries amino acids to the ribosome during translation, where they are used to build a polypeptide chain. tRNA molecules have specific sequences of nucleotides called anticodons that are complementary to the codons on mRNA. This allows tRNA to recognize and bind to the appropriate amino acid and deliver it to the ribosome. Therefore, trna is the correct answer as it accurately relates to the topic of "Penerjemah kodon" (Codon translator).

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  • 15. 
    Perhatikan gambar! Nomor 3 dan 4 menunjukkan ... .     - ProProfs

    Perhatikan gambar! Nomor 3 dan 4 menunjukkan ... .    

    • Kromatid dan nukleosida

    • Ribosom dan mRNA

    • Nukleosom dan kromatid

    • Histon dan mRNA

    • Nukleosom dan histon

    Correct Answer
    A. Nukleosom dan kromatid
  • 16. 

    Gen yang terletak pada lokus yang bersesuaian pada kromosom berpasangan disebut … .

    • DNA

    • RNA

    • Alel

    • Alel ganda

    • Kromosom homolog

    Correct Answer
    A. Alel
    Explanation
    The correct answer is "Alel". Alel refers to the different forms of a gene that can exist at a specific locus on a pair of homologous chromosomes. Each parent contributes one allele to their offspring, and the combination of alleles determines the individual's genetic traits.

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  • 17. 

    Molekul DNA makhluk hidup tersusun dalam rantai panjang yang disebut … .

    • Nukleotida

    • Polipeptida

    • Asam fosfat

    • Deoksiribosa

    • Polinukleotida

    Correct Answer
    A. Polinukleotida
    Explanation
    The correct answer is "polinukleotida." Molekul DNA makhluk hidup tersusun dalam rantai panjang yang disebut polinukleotida.

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  • 18. 

    Apabila DNA yang mengkode sintesis protein adalah TAC CTT GAT GGT CAC, antisense-nya adalah … .

    • UAC CUU GAU GGU CAC

    • ATG GAA CTA CCA GTG

    • CAC GGU GAU CUU UAC

    • GUG CCA CUA GAA AUG

    • AUG GAA CUA CCA GUG

    Correct Answer
    A. ATG GAA CTA CCA GTG
    Explanation
    The given DNA sequence is TAC CTT GAT GGT CAC. To find the antisense sequence, we need to replace each base with its complementary base. A pairs with T, T pairs with A, C pairs with G, and G pairs with C. Therefore, the antisense sequence is ATG GAA CTA CCA GTG.

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  • 19. 

    Bila DNA yang mengkode sintesis protein adalah: TAC CGA TTC AGA TCA Maka antikodon-nya adalah … .   

    • UAC CGA UUC AGA UCA

    • CUA GGA GUG CCA AUG

    • AUG GUG SSA GAA SUA

    • UAC GGU CAC CUU GAU

    • AUG GCU AAG UCU AGU

    Correct Answer
    A. UAC CGA UUC AGA UCA
    Explanation
    The antikodon is the complementary sequence to the codon in mRNA. In this case, the codon in the mRNA is TAC CGA TTC AGA TCA, so the antikodon would be UAC CGA UUC AGA UCA.

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  • 20. 

    Hasil susunan dan pengaturan kromosom

    Correct Answer
    kariogram
    Explanation
    The given answer "kariogram" is the correct explanation for the given question. Kariogram refers to the arrangement and organization of chromosomes in a cell. It involves analyzing the size, shape, and banding patterns of chromosomes to determine any abnormalities or genetic disorders. By studying the kariogram, scientists and geneticists can gain insights into an individual's genetic makeup and identify any chromosomal abnormalities or genetic diseases present.

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  • Current Version
  • Jul 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 16, 2012
    Quiz Created by
    Budile_bio
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