ورقة عمل الأحياء لامتحانات القبول في التمريض مع الإجابات

Which pigment absorbs light energy for photosynthesis?

1. AHaemoglobin
2. BMelanin
3. CChlorophyll
4. DKeratin

What is the main job of the cell wall in a plant cell?

1. ATo control which genes are switched on in the nucleus
2. BTo make proteins for the cell
3. CTo release energy from glucose
4. DTo support the cell and stop it from bursting

In biology, what is a clone?

1. AAn organism that carries genes from two different species
2. BAn offspring of two different parents
3. CA genetically identical copy of an organism, cell or gene
4. DA cell with an extra chromosome

Yeast in bread dough breaks down sugar without oxygen. What does it produce?

1. ALactic acid and carbon dioxide
2. BGlucose and oxygen
3. COxygen and water
4. DEthanol and carbon dioxide

There are 64 possible codons but only about 20 amino acids. What does this tell you about the genetic code?

1. AOnly 20 of the codons are ever used
2. BMost amino acids are coded for by more than one codon
3. CEach codon codes for more than one amino acid at the same time
4. DEach amino acid has exactly three codons

بِمَ تختلف الدهون المشبعة عن الدهون غير المشبعة؟

1. Aليس فيها روابط مزدوجة C=C وتكون صلبة عادةً
2. Bفيها روابط مزدوجة كثيرة وتكون سائلة في درجة حرارة الغرفة
3. Cتذوب بسهولة في الماء
4. Dتحتوي على نيتروجين وتكوّن البروتينات

Griffith injected mice with heat-killed harmful bacteria mixed with live harmless bacteria. The mice died, and live harmful bacteria were found in them. What did this show?

1. AHeat makes harmless bacteria become harmful when they are injected
2. BBacteria can be killed by the immune system of mice
3. CA substance from the dead bacteria changed the harmless ones
4. DThe mice were killed by the dead bacteria alone

A patient with type A blood is given type B red blood cells by mistake. What is the cause of the reaction that follows?

1. AThe donor's B antigens destroy the patient's white blood cells
2. BThe patient's A antigens dissolve the donor's haemoglobin
3. CAnti-B antibodies in the patient's plasma attack the donor cells
4. DAnti-A antibodies on the donor cells attack the patient's plasma