उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए जीव विज्ञान वर्कशीट

What is activation energy?

1. AThe energy needed to start a chemical reaction
2. BThe energy plants take in from sunlight
3. CThe energy stored in a molecule of ATP
4. DThe heat released when a reaction finishes

Which sugar is found in DNA?

1. AFructose
2. BRibose
3. CDeoxyribose
4. DGlucose

In an enzyme reaction, what is the substrate?

1. AThe gene that codes for the enzyme
2. BThe product released at the end
3. CThe part of the enzyme that changes shape
4. DThe substance that the enzyme acts on

ग्राम अभिरंजन में ग्राम-पॉज़िटिव जीवाणु बैंगनी क्यों रंगते हैं?

1. Aउनमें कोई कोशिका भित्ति होती ही नहीं
2. Bउनकी मोटी पेप्टिडोग्लाइकन भित्ति बैंगनी रंजक को रोके रखती है
3. Cउनकी पतली भित्ति पर लिपिडों से भरपूर बाहरी झिल्ली चढ़ी होती है
4. Dउनमें क्लोरोफ़िल होता है

White blood cells called macrophages engulf and digest bacteria. Which organelle would you expect them to have in large numbers?

1. ASmooth endoplasmic reticulum
2. BChloroplasts
3. CCentral vacuoles
4. DLysosomes

Which statement about identical and non-identical twins is correct?

1. ABoth kinds of twin always share all of their genes
2. BNon-identical twins come from one zygote that splits in two
3. CIdentical twins come from two eggs that are fertilised by a single sperm
4. DIdentical twins come from one zygote; non-identical twins come from two

Why is one new DNA strand made in short pieces (Okazaki fragments) during replication?

1. AOnly half of the DNA needs to be copied
2. BDNA polymerase works only 5' to 3', and the strands are antiparallel
3. CThe lagging strand is made of RNA instead of DNA, so it must be built in pieces
4. DHelicase cuts that strand into pieces before copying

अधिकांश कोशिकाएँ बहुत छोटी क्यों होती हैं?

1. Aछोटी कोशिकाओं में बड़ी कोशिकाओं से अधिक DNA होता है
2. Bबड़ी कोशिकाओं में माइटोकॉन्ड्रिया नहीं हो सकते
3. Cछोटी कोशिकाओं को ऑक्सीजन की ज़रूरत नहीं होती
4. Dछोटी कोशिकाओं में पृष्ठीय क्षेत्रफल और आयतन का अनुपात अधिक होता है