Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
Which unique feature of prokaryotic DNA replication allows for rapid cell division?
Presence of introns
Single origin of replication
Linear chromosomes
Multiple replication forks
The presence of hopanoids in some prokaryotic plasma membranes primarily contributes to:
Protein synthesis
Nutrient transport
Membrane stability
Photosynthesis
A novel unicellular eukaryote is discovered with an unusual Golgi apparatus. Instead of the typical cis-trans polarity, its Golgi cisternae appear randomly distributed throughout the cytoplasm. Which cellular process would be MOST severely impacted by this disorganized Golgi?
Ribosome biogenesis
Transcription of mRNA
Targeted protein delivery to lysosomes and the plasma membrane
ATP synthesis via oxidative phosphorylation
Which of the following is NOT a function associated with the smooth endoplasmic reticulum (SER)?
Lipid synthesis
Detoxification of drugs and poisons
Calcium ion storage
Glycosylation of proteins
A mutation affects a eukaryotic cell's ability to add mannose-6-phosphate tags to proteins. Which organelle's function would be MOST directly compromised?
Nucleus
Peroxisome
Lysosome
Mitochondrion
Certain eukaryotic cells possess extensive networks of both smooth and rough ER. Which of the following cell types would likely have the HIGHEST combined surface area of ER?
Red blood cells
Skin epithelial cells
Steroid-producing cells
Muscle cells
A researcher observes a eukaryotic cell lacking functional peroxisomes. Which of the following metabolic processes would be MOST directly affected?
Glycolysis
Breakdown of long-chain fatty acids
Synthesis of proteins
Replication of DNA
Which statement BEST describes the relationship between the nuclear envelope and the endoplasmic reticulum?
The nuclear envelope is entirely separate from the endoplasmic reticulum.
The inner membrane of the nuclear envelope is continuous with the smooth ER membrane.
The outer membrane of the nuclear envelope is continuous with the rough ER membrane.
The nuclear envelope is formed by invaginations of the Golgi apparatus.
Histone H1 plays a crucial role in the structure of chromatin. Which of the following statements regarding its interaction and function is INCORRECT?
H1 binds to the linker DNA between nucleosomes.
H1 helps to compact chromatin structure.
H1 interacts with the core histones within the nucleosome octamer.
H1 stabilizes the interaction of DNA with the nucleosome.
Certain histone modifications are associated with actively transcribed genes. Which of the following combinations is MOST likely to be found in the nucleosomes of such genes?
Methylation of H3K9 and H3K27; Deacetylation of H3 and H4
Phosphorylation of H2AX; Trimethylation of H3K9
Acetylation of H3 and H4; Trimethylation of H3K4
Ubiquitination of H2A; Trimethylation of H3K27
