Lembar kerja Biologi untuk ujian masuk keperawatan dengan jawaban

What is true of a recessive allele?

1. AIts trait shows only when two copies are present
2. BIts trait shows whenever one copy is present
3. CIt is always harmful to the organism
4. DIt is found only on the X chromosome

What are homologous chromosomes?

1. AA matching pair, one from each parent, that carry the same genes
2. BTwo chromosomes that are always the X and the Y
3. CTwo identical copies of one chromosome made when DNA is replicated
4. DChromosomes that are found only in gametes

Berapa jumlah kromosom pada sel tubuh manusia yang khas?

1. A46
2. B44
3. C23
4. D92

What does Mendel's law of segregation state?

1. ADominant alleles are more common in a population than recessive ones
2. BGenes on different chromosomes are always inherited together
3. CEach gamete receives both alleles of every gene
4. DThe two alleles of a gene separate so each gamete gets only one

Why do root hair cells have long, thin extensions?

1. ATo increase the surface area for absorbing water
2. BTo anchor the plant firmly against strong winds and rain
3. CTo store starch for the winter
4. DTo carry out photosynthesis underground

Dua induk heterozigot (Aa × Aa) disilangkan. Berapa perbandingan genotipe yang diharapkan?

1. A3 AA : 1 aa
2. B1 AA : 1 aa
3. C1 AA : 2 Aa : 1 aa
4. D2 AA : 1 Aa : 1 aa

Untuk mengetahui seberapa banyak orang dewasa di sebuah kota berolahraga, seorang peneliti hanya mensurvei orang yang keluar dari pusat kebugaran. Apa masalah utamanya?

1. ASampelnya terlalu acak untuk berguna
2. BSurvei tidak pernah dapat dipakai dalam sains
3. CPeneliti tidak memiliki variabel terikat
4. DSampelnya bias ke arah orang yang aktif

How does the CRISPR-Cas9 gene-editing system find the right place to cut DNA?

1. AIt binds only to the start codon of every gene
2. BThe Cas9 protein cuts DNA at random sites
3. CIt reads the amino acid sequence of the protein
4. DA guide RNA pairs with the matching DNA sequence