Phiếu bài tập Sinh học cho kỳ thi đầu vào điều dưỡng có đáp án

Đơn vị nào thường dùng nhất để cho biết kích thước của tế bào?

1. AKilomet (km)
2. BMét (m)
3. CMicromet
4. DLít (L)

Khuếch tán là gì?

1. ASự di chuyển của các hạt từ nơi nồng độ thấp đến nơi nồng độ cao
2. BTế bào nuốt các hạt lớn trong một túi
3. CSự di chuyển của nước qua màng có dùng ATP
4. DSự di chuyển của các hạt từ nơi nồng độ cao đến nơi nồng độ thấp

What does it mean that a cell membrane is selectively permeable?

1. AIt lets some substances cross but not others
2. BIt lets every substance cross freely in both directions
3. CIt lets no substance cross at all
4. DIt lets only water molecules cross

What is the role of ribosomal RNA (rRNA)?

1. AIt carries the code from DNA to the ribosome
2. BIt forms part of the ribosome and helps join amino acids
3. CIt brings single amino acids to the ribosome
4. DIt stores genetic information in the nucleus

What is a chromosomal translocation?

1. AOne DNA base is replaced by another base
2. BA piece of a chromosome is copied twice and stays in the same place
3. CA piece of one chromosome attaches to a non-matching chromosome
4. DA piece of a chromosome is flipped around in place

Why are G–C base pairs held together more strongly than A–T pairs?

1. AG–C pairs form three hydrogen bonds, and A–T pairs form two
2. BG–C pairs are joined by strong covalent bonds instead of hydrogen bonds
3. CA–T pairs are found only in RNA
4. DG and C are both purines, so they fit more tightly

Why can O-negative red blood cells be given to patients of almost any blood type in an emergency?

1. AThey carry all of the A, B and RhD antigens
2. BThey have no haemoglobin to react with
3. CTheir plasma contains anti-A and anti-B antibodies
4. DThey carry no A, B or RhD antigens

A scientist wants to show that a particular microbe causes a disease. According to Koch's postulates, which step is needed?

1. AThe microbe grown from a sick host must cause the disease in a healthy host
2. BThe disease must be treated successfully with antibiotics
3. CThe microbe must be seen in the blood under a light microscope
4. DThe microbe must be found in healthy hosts just as often as in sick hosts