Which of the following cell organelles is present in the highest number in secretory cells?
| 1. | Mitochondria | 2. | Golgi complex |
| 3. | Endoplasmic reticulum | 4. | Lysosomes |
Non-membranous nucleoplasmic structures in the nucleus, are the sites for active synthesis of:
| 1. | protein | 2. | mRNA |
| 3. | rRNA | 4. | tRNA |
Which of the following nucleic acids is present in an organism having 70 S ribosomes only?
| 1. | Single-stranded DNA with a protein coat |
| 2. | Double-stranded circular naked DNA |
| 3. | Double-stranded DNA enclosed in nuclear membrane |
| 4. | Double-stranded circular DNA with histone proteins |
After meiosis I, the resultant daughter cells have
| 1. | same amount of DNA as in the parent cell in S |
| 2. | twice the amount of DNA in comparison to haploid |
| 3. | same amount of DNA in comparison to haploid gamete |
| 4. | four times the amount of DNA in comparison to haploid gamete |
Which of the following organic compounds is the main constituent of Lecithin?
| 1. | Arachidonic acid | 2. | Phospholipid |
| 3. | Cholesterol | 4. | Phosphoprotein |
The main difference between active and passive transport across cell membrane is :
| 1. | passive transport is non-selective whereas active transport is selective |
| 2. | passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes. |
| 3. | passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel. |
| 4. | active transport occurs more rapidly than passive |
Match the items given in Column - I with those in Column - II and choose the correct option:
| Column-I | Column-II | ||
| (a) | Rennin | (i) | Vitamin B12 |
| (b) | Enterokinase | (ii) | Facilitated transport |
| (c) | Oxyntic cells | (iii) | Milk proteins |
| (d) | Fructose | (iv) | Trypsinogen |
| Options: | (a) | (b) | (c) | (d) |
| 1. | iii | iv | ii | i |
| 2. | iv | iii | i | ii |
| 3. | iv | iii | ii | i |
| 4. | iii | iv | i | ii |
Kwashiorkor disease is due to:
| 1. | simultaneous deficiency of proteins and fats |
| 2. | simultaneous deficiency of proteins and calories |
| 3. | deficiency of carbohydrates |
| 4. | protein deficiency not accompanied by calorie deficiency |
Select the correct sequence of events.
| 1. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
| 2. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Organogenesis → Cell differentiation |
| 3. | Gametogenesis → Syngamy → Gamete transfer → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
| 4. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell differentiation → Cell division (Cleavage) → Organogenesis |
Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?
| 1. | Estrogen | 2. | Prolactin |
| 3. | Oxytocin | 4. | Relaxin |
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